System, method, and computer-readable medium for accelerating the adjustment of a composite core sandwich specimen

Abstract

In an example, a system, a method, and a computer-readable medium for accelerating the conditioning of a composite core sandwich specimen are described. The method includes setting a first temperature and a first relative humidity level of a conditioning apparatus, wherein the combination of the first temperature and the first relative humidity level corresponds to a desired relative humidity level of a plurality of cells of a core layer at room temperature. The method includes maintaining the first temperature and the first relative humidity for a first time period, wherein, during the first time period, the core humidity of the plurality of cells in the core layer approaches the first relative humidity level. The method includes determining that the core humidity has reached the first relative humidity level. The method includes adjusting the first temperature to a second temperature based on determining that the core humidity has reached the first relative humidity level.

Description

Technical Field

[0001] The present disclosure generally relates to the accelerated conditioning of materials. Specifically, the present disclosure relates to the accelerated conditioning of composite core sandwich specimens. Background Art

[0002] Before incorporating materials into a system (such as an aircraft) with an expected service life, it is important to ensure that these materials will maintain a baseline performance level for at least the entire expected service life. This may involve subjecting such materials to the conditions expected to be encountered during system operation.

[0003] However, if the expected useful length of the system is several years, it may be impractical to wait the same period of time to test the materials. In particular, the time taken to test the materials may be longer than the time taken to develop potentially improved materials, and the standards applicable during this period may change. Thus, testing materials for the full expected service life of the system is generally ineffective. Existing methods for accelerating the conditioning of materials to allow for faster incorporation into the system still take months or years. In particular, incorporating moisture into certain materials (such as composite core materials) may take an excessive amount of time.

[0004] There is a need for a system for accelerating the conditioning of composite core materials that can condition these materials quickly and reliably. Summary of the Invention

[0005] In an example, a method for accelerating the conditioning of a composite core sandwich coupon within a conditioning device is provided. The composite core sandwich coupon includes (i) an outer composite layer and (ii) an inner core layer, and wherein the core layer includes a plurality of cells. The method includes setting, by a controller of the conditioning device, a first temperature and a first relative humidity level of the conditioning device at a first time, wherein the first temperature is above room temperature, and wherein the combination of the first temperature and the first relative humidity level corresponds to a desired relative humidity level of the plurality of cells of the core layer at room temperature. The method includes maintaining, by the controller, the first temperature and the first relative humidity for a first time period, wherein, during the first time period, the core humidity of the plurality of cells in the core layer approaches the first relative humidity level. The method includes determining that the core humidity has reached the first relative humidity level. The method includes, based on determining that the core humidity has reached the first relative humidity level, adjusting, by the controller of the conditioning device, the first temperature to a second temperature at a second time, wherein the second temperature is between the first temperature and room temperature, and wherein, in response to adjusting the first temperature to the second temperature, the outer composite layer absorbs moisture from the inner core layer to approach the desired humidity level.

[0006] In another example, a system for accelerating the conditioning of a composite core sandwich specimen is provided. The system includes a conditioning device having a chamber configured to receive the composite core sandwich specimen, where the composite core sandwich specimen includes (i) an external composite layer and (ii) an internal core layer, and where the core layer includes a plurality of cells. The system includes a humidifier configured to supply water vapor to the chamber of the conditioning device. The system includes a heater configured to supply heat to the chamber of the conditioning device. The system includes a computing device including a processor and a memory, a set of functions, the memory having instructions executable by the processor to perform the set of functions. The set of functions includes controlling the heater to set a first temperature of the conditioning device, controlling the humidifier to set a first relative humidity level of the conditioning device, where the first temperature is higher than room temperature, and where the combination of the first temperature and the first relative humidity level corresponds to a desired relative humidity level of the plurality of cells of the core layer at room temperature. The set of functions includes controlling the heater to maintain the first temperature and controlling the humidifier to maintain the first relative humidity for a first period of time, where during the first period of time, the core humidity of the plurality of cells in the core layer approaches the first relative humidity level. The set of functions includes determining that the core humidity has reached the first relative humidity level. The set of functions includes, based on determining that the core humidity has reached the first relative humidity level, causing the heater to adjust the first temperature to a second temperature at a second time, where the second temperature is between the first temperature and room temperature, and where in response to adjusting the first temperature to the second temperature, the external composite layer absorbs moisture from the internal core layer to approach the desired humidity level.

[0007] In another example, a non-transitory computer-readable medium is described. The computer-readable medium stores instructions thereon that, when executed by one or more processors of a computing device, cause the computing device to perform functions for accelerating the conditioning of a composite core sandwich specimen within a conditioning device. The composite core sandwich specimen includes (i) an external composite layer and (ii) an internal core layer, and where the core layer includes a plurality of cells. The functions include setting, by a controller of the conditioning device, a first temperature and a first relative humidity level of the conditioning device at a first time, where the first temperature is higher than room temperature, and where the combination of the first temperature and the first relative humidity level corresponds to a desired relative humidity level of the plurality of cells of the core layer at room temperature. The functions include maintaining, by the controller, the first temperature and the first relative humidity for a first period of time, where during the first period of time, the core humidity of the plurality of cells in the core layer approaches the first relative humidity level. The functions include determining that the core humidity has reached the first relative humidity level. The functions include, based on determining that the core humidity has reached the first relative humidity level, adjusting, by the controller of the conditioning device, the first temperature to a second temperature at a second time, where the second temperature is between the first temperature and room temperature, and where in response to adjusting the first temperature to the second temperature, the external composite layer absorbs moisture from the internal core layer to approach the desired humidity level.

[0008] The features, functions, and advantages discussed above can be implemented independently in various examples or combined in other examples. Referring to the following description and drawings, more details of the examples can be seen. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The novel features that are considered to be the characteristics of the exemplary embodiments are set forth in the appended claims. However, the illustrative examples, as well as the preferred mode of use, further objectives, and their descriptions, will be best understood by reference to the following detailed description of the illustrative examples of the present disclosure when read in conjunction with the drawings, in which:

[0010] Figure 1 A block diagram showing a system for accelerating the conditioning of a composite core sandwich specimen according to an example implementation.

[0011] Figure 2A A side view showing a composite core sandwich specimen according to an example implementation.

[0012] Figure 2B A top view showing a composite core sandwich specimen according to an example implementation.

[0013] Figure 3 A top view showing a composite core sandwich specimen according to an example implementation.

[0014] Figure 4 A flowchart showing a method for optimizing the energy load in an aviation operation according to an example implementation.

[0015] Figure 5 Showing, according to an example implementation, in conjunction with Figure 4 A flowchart of a method used with the method shown.

[0016] Figure 6 Showing, according to an example implementation, in conjunction with Figure 4 A flowchart of a method used with the method shown.

[0017] Figure 7 Showing, according to an example implementation, in conjunction with Figure 4 A flowchart of a method used with the method shown.

[0018] Figure 8 Showing, according to an example implementation, in conjunction with Figure 4 A flowchart of a method used with the method shown.

[0019] Figure 9 Showing, according to an example implementation, in conjunction with Figure 4 A flowchart of a method used with the method shown.

[0020] Figure 10 Showing, according to an example implementation, in conjunction with Figure 4Flowchart of a method for use with the method shown.

[0021] Figure 11 Illustrates a method for use with Figure 4 the method shown, according to an example implementation.

[0022] Figure 12 Illustrates a method for use with Figure 4 the method shown, according to an example implementation.

[0023] Figure 13 Illustrates a method for use with Figure 4 the method shown, according to an example implementation.

[0024] Figure 14 Illustrates a method for use with Figure 4 the method shown, according to an example implementation. DETAILED DESCRIPTION

[0025] The disclosed examples will now be described more fully hereinafter with reference to the accompanying drawings, in which some, but not all, of the disclosed examples are shown. In fact, many different examples may be described and should not be construed as limited to the examples set forth herein. Rather, these examples are described so that this disclosure will be thorough and complete and will fully convey the scope of the disclosure to those skilled in the art.

[0026] In an example, systems and methods for accelerating the conditioning of composite core sandwich specimens are described. These systems and methods correspond to the moisture mass of composite materials. Such composite materials are commonly used in aircraft, and typically, the main way to condition such materials is to artificially introduce moisture so that the composite core reaches the moisture level expected in similar materials after use throughout the entire expected service life of the aircraft. Since the composite core is typically paper-based, a relatively high moisture content can significantly affect the compressive strength of the material. Therefore, it is important to precisely condition the composite material to the moisture level desired at the end of the aircraft's service life (e.g., 40 years). For example, adjusting the moisture level of the material above this expected moisture level may result in overdesign and waste of resources.

[0027] A composite specimen can include multiple layers having different material types. For example, the specimen can include a first outer layer (e.g., a top panel) of a first material type (e.g., a composite material including multiple material types), a core layer of a second material type (e.g., a paper-based material) disposed below the first outer layer, and a second outer layer of the first material type (e.g., a bottom panel) disposed below the core layer. The outer layers can be composed of composite materials, while the core material can be paper-based, aluminum, or another relatively light material. The core material can be more porous and lighter than the outer layers, but when sandwiched between the outer layers, the core material can be arranged to maximize the compressive strength of the material. For example, the core material can be in a honeycomb arrangement having unit walls extending perpendicular to the outer layers. Due to this construction and material properties, the core material may be more absorbent than the outer layers.

[0028] Testing a composite material in this way generally involves obtaining a specimen of the material and applying a certain pressure to it during a conditioning process, and then determining the property-related quality of the material after conditioning. Given the different hygroscopicities of the outer layers and the core material, exemplary systems and methods involve pre-conditioning to reach the desired humidity level of the core material, and then further conditioning to reach the desired humidity level of the outer layers. In these examples, humidity sensors can be directly embedded in the core material to ensure an accurate switch of the conditioning mode when the desired humidity level of the core material is reached. In this way, at relatively high humidity levels, oversaturation of the core material can be avoided.

[0029] A partial time delay in the conditioning of a composite core sandwich specimen involves the delay of humidity reaching the core material through the outer layers. Thus, in other examples, the conditioning process can be accelerated by introducing holes in the outer layers that facilitate the core material's rapid absorption of humidity. Drilling can be performed in a way that does not substantially affect the strength of the composite core sandwich material for subsequent testing. In related examples, holes can be drilled, water can be injected, and the holes can be filled to further accelerate humidity dispersion.

[0030] In an example, a magnetic field can be applied to further accelerate the core material's absorption of moisture. For example, a strong electromagnet with magnetic field lines extending parallel to the unit walls of the core material can be implemented, which promotes the advancement of water through the core material.

[0031] The examples described herein relate to regulating the relative humidity level within the housing of a conditioning device. It can be understood that the saturated moisture content of air varies with temperature. Thus, in the examples described herein, "relative humidity level" refers to the humidity level relative to the maximum humidity level associated with the saturated moisture content of air at a given temperature. This relative humidity level can be expressed as a percentage.

[0032] Now turning to the drawings, Figure 1 A block diagram of a system 100 for accelerating the conditioning of a composite core sandwich specimen according to an example implementation is shown. Specifically,Figure 1 A controller 102 configured to control an adjustment device 112 is shown. The controller 102 can generally be understood or referred to as a computing device capable of performing functions. Although the controller 102 is depicted as separate from the adjustment device, and thus the same controller can control multiple different devices, in some examples, the controller 102 can be integrated into the adjustment device 112.

[0033] The controller 102 includes one or more processors 104, a memory 106, instructions 108, and a user interface 110. The one or more processors 104 can be general-purpose processors or dedicated processors (e.g., digital signal processors, application-specific integrated circuits, etc.). The one or more processors 104 can be configured to execute the instructions 108 (e.g., computer-readable program instructions) that are stored in the memory 106 and are executable to provide the functions of the controller 102 and the related systems and methods described herein.

[0034] The memory 106 can include or take the form of one or more computer-readable storage media readable or accessible by the processor 104. The computer-readable storage media can include volatile and / or non-volatile storage components, such as optical, magnetic, organic, or other memory or disk storage devices, which can be integrated with the processor 104 in whole or in part. The memory 106 is considered non-transitory computer-readable media. In some examples, the memory 106 can be implemented using a single physical device (e.g., one optical, magnetic, organic, or other memory or disk storage unit), while in other examples, the memory 106 can be implemented using more than two physical devices. Thus, the memory 106 is non-transitory computer-readable storage media, and the instructions 108 executable by the processor 104 are stored on the memory 106. The instructions 108 include computer-executable code.

[0035] The user interface 110 can include or take the form of a keyboard, a mouse, a touch screen, a microphone, a gesture recognition system, a combination thereof, or another means by which the controller 102 receives user input. The user interface can be integrated into the controller 102 as shown Figure 1 or included in another subsystem or device. Although the following examples are generally described as related to using a touch screen, other interfaces are also feasible.

[0036] The conditioning device 112 may include a sealable enclosure configured to hold a composite core sandwich specimen for a period of time and maintain consistent conditions therein. The enclosure may be large enough to accommodate specimens of various sizes. For example, a typical specimen for aircraft testing may be approximately three feet wide by three feet deep and approximately one inch thick. The size of the specimen may vary depending on the type of test being performed. For example, a 3’ x 3’ specimen may be used for large notch testing, a 12” x 0.5” specimen may be used for double cantilever beam (DCB) testing, and a 4” x 6” specimen may be used for surface testing. Different specimen sizes may be used depending on the context and test constraints. The enclosure may have buffers in each direction and may include a platform to expose the bottom of the specimen to conditioning. The size of the enclosure and the specimen may vary depending on the type of application and the material to be tested. As Figure 1 shown, the conditioning device 112 includes a humidifier 114 and a heater 116. The humidifier 114 is configured to provide a precise humidity level to the enclosure, and the heater 116 is configured to increase the heat level of the enclosure. Although not shown, a radiator may be included to quickly reduce the temperature of the enclosure. Also shown in the conditioning device are a core material 118 and a humidity sensor 120. The core material 118 may be understood as the core of the composite core sandwich specimen, and the humidity sensor 120 provides a feedback signal to the controller 102 indicating the progress of humidity absorption of the core material.

[0037] As described in more detail below, the instructions 108 may be executed by the processor 104 to receive inputs from the user interface 110 indicating the configuration and composition of the composite core sandwich specimen. For example, the thickness and material of each layer may be provided, as well as the desired expected life of the material, which will determine the desired humidity level. In other examples, the desired humidity level may also be provided. Additionally, pre-conditioning characteristics of the composite core sandwich specimen may be provided. For example, the user may input whether the outer layer has drilled holes to facilitate humidity absorption. In response to these inputs, the controller 102 may control the conditioning device 112 to subject the composite core sandwich specimen to different heat levels and humidity levels to achieve the desired humidity levels in both the core material and the composite outer layer.

[0038] Relative humidity levels can be used to condition the composite core sandwich structure. Relative humidity corresponds to the percentage of the maximum humidity that a medium (e.g., air) can hold at a specific temperature. Since more water can be held in air as the temperature increases, the same total amount of moisture in air may correspond to a lower relative humidity at a higher temperature compared to a lower temperature. Thus, the controller 102 can set the first temperature in the conditioning device to, for example, approximately 160 degrees Fahrenheit and control the humidifier to set the first relative humidity level to approximately 7%. This can correspond to a relative humidity of approximately 85% at room temperature. The 85% humidity level can be the desired humidity level of the core material at room temperature. However, due to the increased energy associated with the temperature increase, the core can absorb moisture at a higher rate without becoming supersaturated.

[0039] The controller 102 can control the heater 116 to maintain the first temperature for a first time period and control the humidifier 114 to maintain the first relative humidity for a first time period, during which the core moisture of a plurality of cells in the core layer approaches the first relative humidity level of 7%.

[0040] The controller 102 can use feedback from the humidity sensor 120 or rely on a predetermined elapsed time to determine that the core moisture has reached the first relative humidity level of 7%. Then, based on determining that the core moisture has reached the first relative humidity level, the controller 102 can cause the heater 116 to adjust the first temperature to a second temperature between the first temperature (i.e., 160 degrees Fahrenheit) and room temperature. As the controller 102 decreases the temperature, the outer layer of the composite core sandwich structure absorbs moisture from the inner core layer and the housing to reach the desired humidity level. In this way, by allowing moisture absorption from two directions, the absorption of moisture into the composite material of the outer layer can be accelerated. Further description of the method and function for conditioning the composite core sandwich structure is provided below.

[0041] Figure 2A A side view of a composite core sandwich specimen 200 according to an example implementation is shown. Specifically, Figure 2AA cross-sectional view of a composite core sandwich specimen 200 is shown. The composite core sandwich specimen 200 includes a first outer layer 202, a second outer layer 204, and a core layer 206. The first outer layer 202 and the second outer layer 204 are outer layers that can be composed of a composite material formed using more than two different materials, such as carbon fiber reinforced composite (CFRP) or glass fiber reinforced composite (GFRP). The core layer 206 can be formed of a paper-based material that is configured to maximize the compressive strength when sandwiched between the outer layers. These different materials have different moisture absorption qualities, which affect the rate at which they absorb moisture during conditioning. Additionally, the core layer 206 sandwiched between the outer layer 202 and the outer layer 204 affects the rate at which it absorbs moisture. Therefore, the expected period for conditioning the composite core sandwich specimen 200 can be determined based on the known moisture absorption characteristics associated with each material, the thickness of each material, and how the materials are configured.

[0042] Figure 2B A top view of a composite core sandwich specimen 200 according to an example implementation is shown. Specifically, Figure 2B It is shown that the core layer 206 includes a plurality of cells. The plurality of cells have cell walls oriented perpendicular to the first outer layer 202 and the second outer layer 204. If the composite core sandwich specimen 200 is over-conditioned, rather than moisture being directly absorbed into the core material (i.e., the cell walls), the cells themselves may fill with water. This can significantly reduce the compressive strength of the core material while increasing its weight, and this can cause the specimen to perform worse during the testing phase than it would in actual use when integrated into an aircraft for the expected service life of the aircraft. Therefore, properly conditioning the composite core sandwich specimen 200 allows the performance of an aircraft (or any other system) incorporating the material to be more reliable and predictable.

[0043] Although Figure 2B It is shown that the cells of the core layer 206 are square, but other configurations, such as hexagonal, octagonal, or triangular configurations, are also feasible. These configurations may affect the moisture absorption characteristics of the core layer by changing the ratio of material to air in the core layer 206.

[0044] Figure 3 A top view of a composite core sandwich specimen 300 according to an example implementation is shown. Specifically, Figure 3Multiple holes 302 are shown. These holes have a relatively small diameter (e.g., each diameter can be 1% smaller than the width of a cell of the core layer) and are spaced apart (e.g., each hole can be at least three cells away from the nearest adjacent hole). Thus, the time required to condition the composite core sandwich specimen 300 is reduced, and the performance of the composite core sandwich specimen 300 is minimally affected after conditioning. Based on the construction of the layers in the composite core sandwich specimen 300, a computing device can set the diameter of the holes 302 and the spacing between adjacent holes. In other examples, the holes 302 can be determined according to a predetermined pattern.

[0045] For example, a drilling device can be controlled by a computing device to create holes 302 through a composite layer covering the core layer. The computing device can control the drilling device to drill holes in a predetermined pattern through the composite layer. This can reduce the time required for conditioning based on the holes in the predetermined pattern by accelerating the absorption of moisture into the core layer.

[0046] In additional examples, conditioning the composite core sandwich specimen 300 can further include injecting water into the holes and sealing the holes. The injected water can be effectively absorbed while conditioning the composite core sandwich specimen 300, thereby further reducing the time for conditioning the composite core sandwich specimen 300.

[0047] Figure 4 A flowchart of a method 400 for optimizing energy load in an aviation operation according to an example implementation is shown. Figure 4 The method 400 shown demonstrates an example of a method that can be used with Figure 1 the system 100 shown, the composite core sandwich specimen 200 shown in FIG. 2, Figure 3 the composite core sandwich specimen 300 shown, combinations thereof, or components thereof. Additionally, with respect to Figure 4 the functions described can be supplemented, replaced, or combined with the functions described above with respect to Figure 1 , FIG. 2, and Figure 3 described. Additionally, a device or system can be used or configured to perform Figure 4 the logical functions shown in

[0048] In some instances, components of a device and / or system can be configured to perform functions such that the components are physically configured and constructed (with hardware and / or software) to achieve such performance. In other examples, components of a device and / or system can be arranged to be adapted to, capable of, or suitable for performing functions, such as when operating in a particular manner. Method 400 can include one or more operations, functions, or actions shown in one or more of blocks 402 through 408. Additionally, blocks 410 through 444 of method 400 can be performed in accordance with one or more of blocks 402 through 408. Although these blocks are shown in a sequential order, these blocks can also be performed in parallel and / or in an order different from the order described herein. Moreover, various blocks can be combined into fewer blocks, divided into additional blocks, and / or removed based on the desired implementation.

[0049] It should be understood that for this process and other processes and methods disclosed herein, the flowchart depicts the functions and operations of one possible implementation of the example. In this regard, each block or portion of a block can represent a module, segment, or portion of program code that includes one or more instructions that can be executed by a processor to implement a particular logical function or step in the process. The program code can be stored on any type of computer-readable medium or data storage device, for example, a storage device including a magnetic disk or hard drive. Additionally, the program code can be encoded in a machine-readable format on a computer-readable storage medium, or on other non-transitory media or articles. The computer-readable medium can include non-transitory computer-readable media or memories, for example, computer-readable media that stores data for a short period of time such as register memory, processor cache, and random access memory (RAM). The computer-readable medium can also include non-transitory media, such as secondary or permanent long-term storage devices, such as read-only memory (ROM), optical disk, or magnetic disk, compact disc read-only memory (CD-ROM). The computer-readable medium can also be any other volatile or non-volatile storage system. For example, the computer-readable medium can be considered a tangible computer-readable storage medium.

[0050] Additionally, Figure 4 each block or portion of a block, and within other processes and methods disclosed herein, can represent circuitry that is wired to perform a particular logical function in the process. As will be reasonably understood by those skilled in the art, alternative implementations are included within the scope of the examples of the present disclosure, where functions can be performed not in the order shown or discussed (including substantially in parallel or in reverse order), depending on the functions involved.

[0051] Method 400 involves accelerating conditioning a composite core sandwich specimen 200 within a conditioning device 112. The composite core sandwich specimen 200 includes an outer composite layer (e.g., a first outer layer 202) and an inner core layer (e.g., core layer 206), and the core layer includes a plurality of cells. At block 402, method 400 includes setting, by a controller 102 of the conditioning device 112, a first temperature (e.g., 160 degrees Fahrenheit) and a first relative humidity level (e.g., 7%) of the conditioning device 112 at a first time. In an example, the first temperature is higher than room temperature, and the combination of the first temperature and the first relative humidity level corresponds to a desired relative humidity level (e.g., 85%) of the plurality of cells of the core layer at room temperature. The controller 102 can achieve this by controlling a heater 116 and a humidifier 114 incorporated into the conditioning device 112.

[0052] At block 404, method 400 includes maintaining, by the controller 102, the first temperature and the first relative humidity for a first period of time. For example, the first period of time can be a predetermined amount of time associated with the inner core layer reaching the first relative humidity level, or a predetermined amount of time associated with a feedback signal from a humidity sensor 120. During the first period of time, the core humidity of the plurality of cells in the inner core layer approaches the first relative humidity level.

[0053] At block 406, method 400 includes determining that the core humidity has reached the first relative humidity level. For example, after a period of time, the inner core layer can reach a relative humidity of 7%, which corresponds to the materials and their construction (e.g., thickness of the layers) in the composite core sandwich specimen 200.

[0054] At block 408, method 400 includes, based on determining that the core humidity has reached the first relative humidity level, adjusting, at a second time by the controller 102 of the conditioning device 112, the first temperature to a second temperature. The second temperature is between the first temperature and room temperature. For example, the controller 102 can cause the heater 116 to iteratively decrease the temperature and, correspondingly, cause the humidifier 114 to increase the relative humidity to tend towards the desired humidity level at room temperature. In response to adjusting the first temperature to the second temperature, the outer composite layer absorbs moisture from the inner core layer to approach the desired relative humidity level. Additionally, in an example, the outer composite layer can also absorb moisture from the housing of the conditioning device 112 such that the outer composite layer absorbs moisture from two directions during a second period of time.

[0055] Figure 5 A flowchart of a method is shown in accordance with an example implementation for use with Figure 4 the method 400 shown. Specifically, Figure 5Method 400 including block 410 is shown. Block 410 is performed in accordance with block 402. At block 410, method 400 includes setting a first temperature between 140 degrees Fahrenheit and 180 degrees Fahrenheit and setting a first relative humidity level between 5% and 9%. For example, the first temperature can be approximately 160 degrees Fahrenheit and the first relative humidity can be approximately 7%.

[0056] Figure 6 A flowchart of a method used in conjunction with the Figure 4 method 400 shown according to an example implementation is shown. Specifically, Figure 6 Method 400 including block 412 is shown and may also involve Figure 5 the functionality shown in. Block 412 may involve an example where the desired relative humidity level is between 80% and 90%. At block 412, method 400 includes maintaining the total humidity level within the conditioning device 112 while adjusting the first temperature to a second temperature such that the relative humidity level of the conditioning device 112 increases from a first humidity level to near the desired relative humidity level. Maintaining the total humidity level in this manner can prevent the inner core layer from increasing its moisture absorption amount beyond the desired relative humidity level.

[0057] Figure 7 A flowchart of a method used in conjunction with the Figure 4 method 400 shown according to an example implementation is shown. Specifically, Figure 7 Method 400 including blocks 414 and 416 is shown. At block 414, method 400 includes drilling a plurality of holes 302 through the outer composite layer before setting the first temperature and the first relative humidity level. For example, the controller 102 can control the drilling device to drill the plurality of holes 302 as Figure 3 shown or according to another predetermined pattern. In other examples, this may involve receiving an indication of the material and configuration of the composite core sandwich specimen 200 through the user interface 110. At block 416, method 400 further includes reducing the amount of time for a first time period based on the drilled holes 302, based on the number of holes per unit area and the diameter of the holes 302. For example, a higher density of holes and a wider diameter may be inversely proportional to the amount of time for the first time period.

[0058] Figure 8 A flowchart of a method used in conjunction with the Figure 4 method 400 shown according to an example implementation is shown. Specifically, Figure 8 Method 400 including blocks 418 and 420 is shown and may further involve Figure 7The functions shown. At block 418, method 400 includes directly injecting water into each of the plurality of holes 302. At block 420, method 400 further includes sealing the plurality of holes. In this way, at least some of the moisture absorbed by the inner core layer can come from the injected water rather than from the first relative humidity level. In another example, substantially all of the absorbed moisture comes from the injected water, and during the first time period, the relative humidity level plays only a nominal role in conditioning the inner core material during the first time period.

[0059] Figure 9 Shows a flowchart of a method used in conjunction with Figure 4 the method 400 shown. Specifically, Figure 9 shows method 400 including block 422. Block 422 is performed in accordance with block 406. At block 422, method 400 includes determining that a first time period has elapsed. For example, the first time period can be predetermined based on past conditioning data or based on an expected time period calculated based on the materials and configuration of the composite core sandwich specimen 200 (e.g., the thickness of the layers).

[0060] Figure 10 Shows a flowchart of a method used in conjunction with Figure 4 the method 400 shown. Specifically, Figure 10 shows method 400 including blocks 424 and 426. Blocks 424 and 426 are performed in accordance with block 406. At block 424, method 400 includes periodically receiving an output from a humidity sensor 120 embedded in one of the plurality of cells of the core layer. At block 426, method 400 includes determining that the output from the humidity sensor 120 corresponds to the first relative humidity level. For example, the output can be sampled periodically and compared with the first relative humidity level until the output matches the first relative humidity level.

[0061] Figure 11 Shows a flowchart of a method used in conjunction with Figure 4 the method 400 shown. Specifically, Figure 11Method 400 is shown including blocks 428 through 434. At block 428, method 400 includes determining a first time period. Blocks 430, 432, and 434 are performed in accordance with block 428. At block 430, method 400 includes determining the dimensions of composite core sandwich specimen 200. The dimensions include the composite thickness of the composite layers and the core thickness of the core layer. For example, the dimensions may be determined based on providing an input prompt at user interface 110 and receiving a corresponding input from user interface 110. At block 432, method 400 includes determining the core material. For example, the core material may be determined based on providing an input prompt at user interface 110 and receiving a corresponding input from user interface 110. Alternatively, the core material may be determined based on the item number or aircraft type associated with composite core sandwich specimen 200. At block 434, method 400 includes determining the first time period based on the known moisture absorption characteristics of the core material and the core thickness. For example, a computing device may access a database or use memory 106 to determine the known moisture absorption characteristics of the core material and apply the moisture absorption characteristics to the volume of the core material determined based on the core thickness.

[0062] Figure 12 A flowchart of a method is shown in accordance with an example implementation for use with Figure 4 the method 400 shown. Specifically, Figure 12 Method 400 is shown including blocks 436 and 438 and may involve Figure 11 the functionality shown in. At block 436, method 400 includes determining a temperature control scheme for reducing a first temperature to room temperature based on the known moisture absorption characteristics of the composite layers and the composite thickness. For example, this may be performed by controller 102. In these examples, adjusting the first temperature to a second temperature at a second time is part of the temperature control scheme. At block 438, method 400 includes periodically adjusting the first temperature to a nominal temperature between the first temperature and room temperature and adjusting the relative humidity level to a relative humidity level between a first relative humidity level and a desired relative humidity level until room temperature and the desired relative humidity level are reached. For example, this may involve iteratively changing the temperature and humidity levels within the housing of conditioning device 112 until room temperature and the desired relative humidity level are reached. This may also involve maintaining the total humidity level within the enclosure as the relative humidity level changes.

[0063] Figure 13 A flowchart of a method is shown in accordance with an example implementation for use with Figure 4 the method 400 shown. Specifically, Figure 13Method 400 is shown including block 440 and block 442. At block 440, method 400 includes generating a magnetic field at a location within conditioning device 112. For example, an electromagnet can be positioned within the housing of the conditioning device, and controller 102 can be used to control the magnetic field of the electromagnet. At block 442, method 400 includes shortening a first time period based on (i) the magnetic field strength and (ii) the moisture absorption characteristics of the core layer associated with the magnetic field. For example, the moisture absorption characteristics of the core layer associated with the magnetic field can include data from past conditioning specimens using the magnetic field. In this way, the system for conditioning composite core sandwich specimen 200 can absorb moisture more quickly and predictably (due to the direction of the magnetic field lines) and thus perform accelerated conditioning.

[0064] Figure 14 A flowchart of a method is shown in accordance with an example implementation for use with Figure 4 method 400 as shown. Specifically, Figure 14 Method 400 is shown including block 444 and may involve Figure 13 the functionality shown in. At block 444, method 400 includes generating a magnetic field having magnetic field lines extending parallel to the cell walls of a plurality of cells of the core layer.

[0065] Thus, the systems and methods described herein use various devices to reduce the time to condition specimens, particularly composite core sandwich specimens. These functions also improve the reliability and predictability of conditioning specimens and can thus make materials more accurate in a test environment. Additionally, by employing the methods and systems described herein, the performance of a system (such as an aircraft) can be improved during its expected service life and overdesign can be reduced.

[0066] Furthermore, the present disclosure includes embodiments in accordance with the following:

[0067] Item 1. A method (400) for accelerating the conditioning of a composite core sandwich specimen (200) within a conditioning device (112), wherein the composite core sandwich specimen (200) includes (i) an outer composite layer (202) and (ii) an inner core layer (206), and wherein the core layer (206) includes a plurality of cells, the method comprising:

[0068] (402) setting, by a controller (102) of the conditioning device (112), a first temperature and a first relative humidity level of the conditioning device (112) at a first time, wherein the first temperature is higher than room temperature, and wherein the combination of the first temperature and the first relative humidity level corresponds to a desired relative humidity level of the plurality of cells of the core layer (206) at room temperature;

[0069] (404) The controller (102) maintains the first temperature and the first relative humidity for a first time period, wherein, during the first time period, the core humidity of a plurality of cells in the core layer (206) approaches the first relative humidity level;

[0070] (406) Determine that the core humidity has reached the first relative humidity level; and

[0071] (408) Based on determining that the core humidity has reached the first relative humidity level, at a second time, the controller (102) of the conditioning device (112) adjusts the first temperature to a second temperature, wherein the second temperature is between the first temperature and the room temperature, and wherein, in response to adjusting the first temperature to the second temperature, the outer composite layer (202) absorbs moisture from the inner core layer (206) to approach the desired humidity level.

[0072] Item 2. The method according to item 1, wherein setting the first temperature and the first humidity level includes (410) setting the first temperature between 140 degrees Fahrenheit and 180 degrees Fahrenheit, and setting the first relative humidity level between 5% and 9%.

[0073] Item 3. The method according to item 2, wherein the desired relative humidity level is between 80% and 90%, and the method further includes (412) maintaining the total humidity level within the conditioning device when adjusting the first temperature to the second temperature, such that the relative humidity level of the conditioning device (112) increases from the first humidity level to approach the desired relative humidity level.

[0074] Item 4. The method according to item 1, 2 or 3, further comprising:

[0075] (414) Drill a plurality of holes (302) through the outer composite layer (202) before setting the first temperature and the first relative humidity level; and

[0076] (416) Based on the drilled holes (302), reduce the amount of time of the first time period based on the number of holes (302) per unit area and the diameter of the holes (302).

[0077] Item 5. The method according to item 4, further comprising:

[0078] (418) Inject water directly into each of the plurality of holes (302); and

[0079] (420) Seal the plurality of holes (302).

[0080] Item 6. The method according to any one of items 1 to 5, wherein (406) determining that the core humidity has reached the first relative humidity level includes (422) determining that the first time period has elapsed.

[0081] Item 7. The method according to any one of Items 1 to 6, wherein (406) determining that the core humidity has reached a first relative humidity level includes:

[0082] (424) periodically receiving the output from a humidity sensor in one of a plurality of cells embedded in the core layer (206); and

[0083] (426) determining that the output from the humidity sensor corresponds to the first relative humidity level.

[0084] Item 8. The method according to any one of Items 1 to 7, further including: (428) determining a first time period, wherein determining the first time period includes:

[0085] (430) determining the dimensions of the composite core sandwich specimen (200), wherein the dimensions include the composite thickness of the composite layer and the core thickness of the core layer (206);

[0086] (432) determining the core material; and

[0087] (434) determining the first time period based on the known humidity absorption characteristics of the core material and the core thickness.

[0088] Item 9. The method according to Item 8, further including:

[0089] (436) determining a temperature control scheme for reducing the first temperature to room temperature based on the known humidity absorption characteristics of the composite layer and the composite thickness, wherein adjusting the first temperature to a second temperature at a second time is part of the temperature control scheme; and

[0090] (438) periodically adjusting the first temperature to a nominal temperature between the first temperature and room temperature, and adjusting the relative humidity level to a relative humidity level between the first relative humidity level and the desired relative humidity level until room temperature and the desired relative humidity level are reached.

[0091] Item 10. The method according to any one of Items 1 to 9, further including:

[0092] (440) generating a magnetic field at a location within the conditioning device (112); and

[0093] (442) shortening the first time period based on (i) the magnetic field strength and (ii) the humidity absorption characteristics of the core layer (206) associated with the magnetic field.

[0094] Item 11. The method according to Item 10, wherein (440) generating the magnetic field includes (444) generating a magnetic field having magnetic field lines extending parallel to the cell walls of the plurality of cells of the core layer (206).

[0095] Item 12. A system (100) for accelerating the conditioning of a composite core sandwich specimen (200), comprising:

[0096] A conditioning device (112) having a chamber configured to receive a composite core sandwich specimen (200), wherein the composite core sandwich specimen (200) comprises (i) an outer composite layer (202) and (ii) an inner core layer (206), and wherein the core layer (206) comprises a plurality of cells;

[0097] A humidifier (114) configured to supply water vapor to the chamber of the conditioning device (112);

[0098] A heater (116) configured to supply heat to the chamber of the conditioning device (112); and

[0099] A computing device comprising a processor (104) and a memory (106), the memory having instructions (108) executable by the processor (104) to perform a set of functions, the set of functions comprising:

[0100] Controlling the heater (116) to set a first temperature of the conditioning device (112), controlling the humidifier (114) to set a first relative humidity level of the conditioning device (112), wherein the first temperature is higher than room temperature, and wherein the combination of the first temperature and the first relative humidity level corresponds to a desired relative humidity level of the plurality of cells of the core layer (206) at room temperature;

[0101] Controlling the heater (116) to maintain the first temperature for a first time period and controlling the humidifier (114) to maintain the first relative humidity for the first time period, wherein during the first time period, the core humidity of the plurality of cells in the core layer (206) approaches the first relative humidity level;

[0102] Determining that the core humidity has reached the first relative humidity level; and

[0103] Based on determining that the core humidity has reached the first relative humidity level, causing the heater (116) to adjust the first temperature to a second temperature at a second time, wherein the second temperature is between the first temperature and room temperature, and wherein in response to adjusting the first temperature to the second temperature, the outer composite layer (202) absorbs moisture from the inner core layer (206) to approach the desired humidity level.

[0104] Item 13. The system according to item 12, wherein controlling the heater (116) to set the first temperature and controlling the humidifier (114) to set the first humidity level comprises controlling the heater (116) to set the first temperature to approximately 160 degrees Fahrenheit and controlling the humidifier (114) to set the first relative humidity level to approximately 7%.

[0105] Item 14. The system according to item 12 or 13 further comprises:

[0106] A humidity sensor embedded in one of a plurality of cells of the core layer (206), wherein determining that the core humidity has reached a first relative humidity level comprises:

[0107] Periodically receiving an output from the humidity sensor; and

[0108] Determining that the output from the humidity sensor corresponds to the first relative humidity level.

[0109] Item 15. The system according to item 12 or 13, wherein the computing device comprises a user interface, and wherein the set of functions further comprises:

[0110] Receiving, by the user interface, an indication of: (i) the material type of the composite layer, (ii) the material type of the core layer (206), and (iii) the layer thickness and configuration of the composite core sandwich specimen (200); and

[0111] Determining a first time period based on receiving an indication of: (i) the material type of the composite layer, (ii) the material type of the core layer (206), and (iii) the layer thickness and configuration of the composite core sandwich specimen (200).

[0112] Item 16. The system according to item 12 or 13 further comprises an electromagnet, and wherein the set of functions further comprises:

[0113] Controlling the electromagnet to generate a magnetic field at a location within the conditioning device (112); and

[0114] Shortening the first time period based on (i) the magnetic field strength and (ii) the humidity absorption characteristics of the core layer (206) associated with the magnetic field.

[0115] Item 17. The system according to item 16, wherein generating the magnetic field comprises generating a magnetic field having magnetic field lines extending parallel to the cell walls of the plurality of cells of the core layer (206).

[0116] Item 18. The system according to item 12 or 13 further comprises a drilling device configured to generate a plurality of holes (302) through the composite layer, and the set of functions further comprises:

[0117] Controlling the drilling device to drill holes (302) in a predetermined pattern through the composite layer; and

[0118] Shortening the first time period based on the holes (302) in the predetermined pattern.

[0119] Item 19. A non - transitory computer - readable medium stores instructions (108) that, when executed by one or more processors (104) of a computing device, cause the computing device to perform functions for accelerating conditioning a composite core sandwich specimen (200) within a conditioning device (112), where the composite core sandwich specimen (200) includes (i) an outer composite layer (202) and (ii) an inner core layer (206), and where the core layer (206) includes a plurality of cells, and the functions include:

[0120] At a first time, set a first temperature and a first relative humidity level of the conditioning device (112) by a controller (102) of the conditioning device (112), where the first temperature is higher than room temperature, and where the combination of the first temperature and the first relative humidity level corresponds to a desired relative humidity level of the plurality of cells of the core layer (206) at room temperature;

[0121] Maintain the first temperature and the first relative humidity for a first time period by the controller (102), where, during the first time period, the core humidity of the plurality of cells in the core layer (206) approaches the first relative humidity level;

[0122] Determine that the core humidity has reached the first relative humidity level; and

[0123] Based on determining that the core humidity has reached the first relative humidity level, at a second time, adjust the first temperature to a second temperature by the controller (102) of the conditioning device (112), where the second temperature is between the first temperature and room temperature, and where, in response to adjusting the first temperature to the second temperature, the outer composite layer (202) absorbs moisture from the inner core layer (206) to approach the desired humidity level.

[0124] Item 20. The non - transitory computer - readable medium according to Item 19, where setting the first temperature and the first humidity level includes setting the first temperature between 140 degrees Fahrenheit and 180 degrees Fahrenheit and setting the first relative humidity level between 5% and 9%, and where the desired relative humidity level is between 80% and 90%, and the functions further include:

[0125] When adjusting the first temperature to the second temperature, maintain the total humidity level within the conditioning device such that the relative humidity level of the core layer (206) increases from the first humidity level to approach the desired relative humidity level.

[0126] As used herein, the terms “substantially”, “similarity” and “about” mean that the recited features, parameters or values need not be precisely achieved, but that variations in magnitude may occur, including for example tolerances, measurement errors, measurement precision limitations and other factors known to those skilled in the art, without excluding the effect that the characteristic is intended to provide.

[0127] Various examples of the systems, devices, and methods disclosed herein include various components, features, and functions. It should be understood that the various examples of the systems, devices, and methods disclosed herein can include any components, features, and functions of any other example of the systems, devices, and methods disclosed herein in any combination or any sub - combination, and all such possibilities are intended to be within the scope of the present disclosure.

[0128] The description of the different advantageous arrangements has been given for purposes of illustration and description and is not intended to be exhaustive or limited to the examples in the disclosed form. Many modifications and variations will be apparent to those of ordinary skill in the art. Additionally, different advantageous examples may describe different advantages compared to other advantageous examples. The selected one or more examples are chosen and described in order to best explain the principles of the examples, practical application, and to enable other ordinary skill in the art to understand the various examples of the present disclosure, which have various modifications suitable for the particular use contemplated.

Claims

1. A method (400) for accelerating the adjustment of a composite core sandwich specimen (200) within an adjustment device (112), wherein, The composite core sandwich specimen (200) includes (i) an outer composite layer (202) and (ii) an inner core layer (206), and wherein the core layer (206) includes a plurality of cells, the method comprising: (402) setting, by a controller (102) of the conditioning device (112) at a first time, a first temperature and a first relative humidity level of the conditioning device (112), wherein the first temperature is set between 140 degrees Fahrenheit and 180 degrees Fahrenheit, and the first relative humidity level is set between 5% and 9%, and wherein the combination of the first temperature and the first relative humidity level corresponds to a desired relative humidity level of the plurality of cells of the core layer (206) at room temperature, wherein the desired relative humidity level is between 80% and 90%; (404) maintaining, by the controller (102), the first temperature and the first relative humidity level for a first period of time, wherein during the first period of time, the core humidity of the plurality of cells in the core layer (206) approaches the first relative humidity level; (406) determining that the core humidity has reached the first relative humidity level; and (408) based on determining that the core humidity has reached the first relative humidity level, adjusting, at a second time, by the controller (102) of the conditioning device (112), the first temperature to a second temperature, wherein the second temperature is between the first temperature and room temperature, and wherein in response to adjusting the first temperature to the second temperature, the outer composite layer (202) absorbs moisture from the inner core layer (206) to approach the desired relative humidity level.

2. The method according to claim 1, the method further comprising (412) maintaining a total humidity level within the conditioning device when adjusting the first temperature to the second temperature such that the relative humidity level of the conditioning device (112) increases from the first relative humidity level to approach the desired relative humidity level.

3. The method according to claim 1, further comprising: (414) drilling a plurality of holes (302) through the outer composite layer (202) before setting the first temperature and the first relative humidity level; and (416) based on the drilled holes (302), reducing the amount of time of the first period of time based on the number of the holes (302) per unit area and the diameter of the holes (302).

4. The method according to claim 3, further comprising: (418) injecting water directly into each of the plurality of holes (302); and (420) sealing the plurality of holes (302).

5. The method according to claim 1, wherein (406) determining that the core humidity has reached the first relative humidity level includes (422) determining that the first period of time has elapsed.

6. The method according to claim 1, wherein (406) determining that the core humidity has reached the first relative humidity level includes: (424) periodically receiving an output from a humidity sensor embedded in one of the plurality of cells of the core layer (206); (426) Determine that the output from the humidity sensor corresponds to the first relative humidity level.

7. The method according to claim 1, further comprising: (428) Determine the first time period, wherein determining the first time period includes: (430) Determine the dimensions of the composite core sandwich specimen (200), wherein the dimensions include the composite thickness of the composite layer and the core thickness of the core layer (206); (432) Determine the core material; and (434) Determine the first time period based on the known moisture absorption characteristics of the core material and the core thickness.

8. The method according to claim 7, further comprising: (436) Determine a temperature control scheme for reducing the first temperature to room temperature based on the known moisture absorption characteristics of the composite layer and the composite thickness, wherein adjusting the first temperature to the second temperature at the second time is part of the temperature control scheme; and (438) Periodically adjust the first temperature to a nominal temperature between the first temperature and room temperature until room temperature is reached, and periodically adjust the relative humidity level to a relative humidity level between the first relative humidity level and the desired relative humidity level until the desired relative humidity level is reached.

9. The method according to claim 1, further comprising: (440) Generate a magnetic field at a location within the conditioning device (112); and (442) Shorten the first time period based on (i) the strength of the magnetic field and (ii) the moisture absorption characteristics of the core layer (206) associated with the magnetic field.

10. The method according to claim 9, wherein, (440) Generating the magnetic field includes (444) generating a magnetic field having magnetic field lines extending parallel to the cell walls of the plurality of cells of the core layer (206).

11. A system (100) for accelerating the conditioning of a composite core sandwich specimen (200), the system (100) comprising: A conditioning device (112) having a chamber configured to receive the composite core sandwich specimen (200), wherein the composite core sandwich specimen (200) includes (i) an outer composite layer (202) and (ii) an inner core layer (206), and wherein the core layer (206) includes a plurality of cells; A humidifier (114) configured to supply water vapor to the chamber of the conditioning device (112); A heater (116) configured to supply heat to the chamber of the conditioning device (112); and A computing device including a processor (104) and a memory (106), the memory (106) having instructions (108) executable by the processor (104) to perform a set of functions, the set of functions including: Control the heater (116) to set a first temperature of the conditioning device (112), and control the humidifier (114) to set a first relative humidity level of the conditioning device (112), wherein the first temperature is set between 140 degrees Fahrenheit and 180 degrees Fahrenheit, and the first relative humidity level is set between 5% and 9%, and wherein the combination of the first temperature and the first relative humidity level corresponds to a desired relative humidity level of the plurality of cells of the core layer (206) at room temperature, wherein the desired relative humidity level is between 80% and 90%; Control the heater (116) to maintain the first temperature for a first period of time and control the humidifier (114) to maintain the first relative humidity level for the first period of time, wherein during the first period of time, the core humidity of the plurality of cells in the core layer (206) approaches the first relative humidity level; Determine that the core humidity has reached the first relative humidity level; and Based on determining that the core humidity has reached the first relative humidity level, cause the heater (116) to adjust the first temperature to a second temperature at a second time, wherein the second temperature is between the first temperature and room temperature, and wherein in response to adjusting the first temperature to the second temperature, the outer composite layer (202) absorbs moisture from the inner core layer (206) to approach the desired relative humidity level.

12. The system according to claim 11, wherein, Controlling the heater (116) to set the first temperature and controlling the humidifier (114) to set the first relative humidity level includes: controlling the heater (116) to set the first temperature to 160 degrees Fahrenheit and controlling the humidifier (114) to set the first relative humidity level to 7%.

13. The system according to claim 11 or 12, further comprising: A humidity sensor embedded in one of the plurality of cells of the core layer (206), wherein determining that the core humidity has reached the first relative humidity level includes: Periodically receiving an output from the humidity sensor; and Determining that the output from the humidity sensor corresponds to the first relative humidity level.

14. The system according to claim 11 or 12, wherein The computing device includes a user interface, and wherein the set of functions further includes: Receiving, via the user interface, indications of: (i) the material type of the composite layer, (ii) the material type of the core layer (206), and (iii) the layer thickness and configuration of the composite core sandwich specimen (200); and Determining the first period of time based on receiving indications of: (i) the material type of the composite layer, (ii) the material type of the core layer (206), and (iii) the layer thickness and configuration of the composite core sandwich specimen (200).

15. The system according to claim 11 or 12, further comprising an electromagnet, wherein, The set of functions further includes: Controlling the electromagnet to generate a magnetic field at a location within the conditioning device (112); and Shorten the first time period based on (i) the intensity of the magnetic field and (ii) the moisture absorption characteristics of the core layer (206) associated with the magnetic field.

16. The system according to claim 15, wherein Generating the magnetic field includes generating a magnetic field having magnetic field lines extending parallel to the cell walls of the plurality of cells of the core layer (206).

17. The system according to claim 11 or 12, further comprising drilling equipment configured to generate a plurality of holes (302) through the composite layer, and the set of functions further comprises: Controlling the drilling equipment to drill the plurality of holes (302) through the composite layer in a predetermined pattern; And Shortening the first time period based on the predetermined pattern of the plurality of holes (302).

18. A non-transitory computer-readable medium stores instructions (108) that, when executed by one or more processors (104) of a computing device, cause the computing device to perform a function for accelerating the conditioning of a composite core sandwich specimen (200) within a conditioning device (112), wherein, The composite core sandwich specimen (200) includes (i) an outer composite layer (202) and (ii) an inner core layer (206), and wherein the core layer (206) includes a plurality of cells, and the functions include: Setting, by a controller (102) of the conditioning device (112), a first temperature and a first relative humidity level of the conditioning device (112) at a first time, wherein the first temperature is set between 140 degrees Fahrenheit and 180 degrees Fahrenheit, and the first relative humidity level is set between 5% and 9%, and wherein the combination of the first temperature and the first relative humidity level corresponds to a desired relative humidity level of the plurality of cells of the core layer (206) at room temperature, and wherein the desired relative humidity level is between 80% and 90%; Maintaining, by the controller (102), the first temperature and the first relative humidity level for a first time period, wherein during the first time period, the core humidity of the plurality of cells in the core layer (206) approaches the first relative humidity level; Determining that the core humidity has reached the first relative humidity level; and Based on determining that the core humidity has reached the first relative humidity level, adjusting, by the controller (102) of the conditioning device (112), the first temperature to a second temperature at a second time, wherein the second temperature is between the first temperature and room temperature, and wherein in response to adjusting the first temperature to the second temperature, the outer composite layer (202) absorbs moisture from the inner core layer (206) to approach the desired relative humidity level.

19. The non-transitory computer-readable medium according to claim 18, wherein, The functions further include: When adjusting the first temperature to the second temperature, maintaining the total humidity level within the conditioning device such that the relative humidity level of the core layer (206) increases from the first relative humidity level to approach the desired relative humidity level.

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