Method for testing the reusability of rigid insulating tiles

Abstract

The present disclosure provides a rigid insulating tile reusable performance test test method, the test method comprising: sequentially performing a cold-heat cycle test, a vacuum pretreatment test and a heat resistance test on a first test piece, and measuring the corresponding first size information and first weight information of the first test piece; sequentially performing a cold-heat cycle test, a vacuum pretreatment test, a heat resistance test, a cold-heat cycle test, a vacuum pretreatment test and a heat resistance test on a second test piece, and measuring the corresponding second size information and second weight information of the second test piece; when the difference between the second size information and the first size information is within a first preset range, it is determined that the reusable performance of the first test piece and the second test piece meets the preset standard; and / or, when the difference between the second weight information and the first weight information is within a second preset range, it is determined that the reusable performance of the first test piece and the second test piece meets the preset standard.

Description

Technical Field

[0001] This disclosure relates to the field of system robustness analysis technology, and more specifically, to a test method for the reusable performance of rigid thermal insulation tiles. Background Technology

[0002] Rigid thermal insulation tiles are a typical thermal protection system for aerospace vehicles. With the development of aerospace vehicles, new types of thermal insulation tile materials characterized by high temperature resistance and lightweight properties are constantly emerging. The flight environment of aerospace vehicles is extremely harsh, involving rapid changes in force and temperature. This places higher demands on the performance of thermal insulation tile materials. In addition to possessing basic mechanical properties and fatigue resistance, they must also have good reusability. Therefore, conducting reusability performance testing of thermal insulation tiles is essential.

[0003] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0004] This disclosure provides a test method for the reusability performance of rigid thermal insulation tiles, which can test the reusability performance of thermal insulation tiles and provide data support for the structural design and performance optimization of thermal insulation tiles.

[0005] According to one aspect of this disclosure, a method for testing the reusability performance of rigid thermal insulation tiles is provided, comprising:

[0006] A first test specimen and a second test specimen are provided, and the first test specimen and the second test specimen are identical in structure, size and material.

[0007] The first test piece was subjected to a cold and hot cycle test, a vacuum pretreatment test, and a heat resistance test in sequence, and the first dimension information and the first weight information of the first test piece were measured.

[0008] The second test piece was subjected to a series of tests in sequence: thermal cycling test, vacuum pretreatment test, heat resistance test, thermal cycling test, vacuum pretreatment test, and heat resistance test. The second dimension information and second weight information of the second test piece were measured.

[0009] When the difference between the second dimension information and the first dimension information is within a first preset range, it is determined that the reusability of the first test piece and the second test piece meets the preset standard; and / or, when the difference between the second weight information and the first weight information is within a second preset range, it is determined that the reusability of the first test piece and the second test piece meets the preset standard.

[0010] In one exemplary embodiment of this disclosure, the testing method further includes:

[0011] A third test specimen and a fourth test specimen are provided, wherein the third test specimen and the fourth test specimen are identical in structure, size and material;

[0012] The third test piece was subjected to a thermal cycling test, a vacuum pretreatment test, and a tensile test in sequence, and the third dimension information and the third weight information of the third test piece were measured.

[0013] The fourth test piece was subjected to a thermal cycling test, a vacuum pretreatment test, a thermal cycling test, a vacuum pretreatment test, and a tensile test in sequence, and the fourth dimension information and the fourth weight information of the fourth test piece were measured.

[0014] When the difference between the fourth dimension information and the third dimension information is within a third preset range, it is determined that the reusability of the third test piece and the fourth test piece meets the preset standard; and / or, when the difference between the third weight information and the fourth weight information is within a fourth preset range, it is determined that the reusability of the third test piece and the fourth test piece meets the preset standard.

[0015] In one exemplary embodiment of this disclosure, the thermal cycling test includes the following steps:

[0016] S1, heat the first test piece, the second test piece, the third test piece or the fourth test piece to a first preset temperature and keep it at that temperature for a first preset time, wherein the first preset temperature is greater than 100°C;

[0017] S2, the first test piece, the second test piece, the third test piece or the fourth test piece are lowered from the first preset temperature to the second preset temperature and maintained for the second preset time, wherein the second preset temperature is less than -30°C;

[0018] Repeat steps S1-S2 a preset number of times.

[0019] In one exemplary embodiment of this disclosure, the first preset temperature is 120℃~140℃; the second preset temperature is -40℃~-60℃.

[0020] In one exemplary embodiment of this disclosure, both the first preset duration and the second preset duration are 8 min to 12 min, and the preset number of times is 110 to 130.

[0021] In one exemplary embodiment of this disclosure, the vacuum pretreatment test includes:

[0022] The first test piece, the second test piece, the third test piece, or the fourth test piece are placed inside a vacuum container, and the pressure of the vacuum container is set to be less than 1.3 × 10⁻⁶. -5 Pa; the duration of the vacuum pretreatment test is 1 to 2 days.

[0023] In one exemplary embodiment of this disclosure, the heat resistance test includes:

[0024] The first or second test piece is placed on a test stand, which is connected to a heating rod.

[0025] The first or second test piece is heated to a third preset temperature using the heating rod, and then cooled after being kept at that temperature for a third preset time.

[0026] In one exemplary embodiment of this disclosure, the third preset temperature is 500℃~600℃, and the third preset duration is 80 seconds~100 seconds.

[0027] In one exemplary embodiment of this disclosure, the tensile test includes:

[0028] The upper and lower surfaces of the third or fourth test piece are bonded to different loading blocks using adhesive, and then cured at a fourth preset temperature.

[0029] The third test piece with the loading block bonded to it or the fourth test piece with the loading block bonded to it is mounted on the test fixture of the testing machine.

[0030] A tensile load is applied to the third or fourth test piece at a preset loading rate until the third or fourth test piece is destroyed.

[0031] In one exemplary embodiment of this disclosure, the fourth preset temperature is 50°C to 70°C.

[0032] This disclosure discloses a reusable performance testing method for rigid thermal insulation tiles. Through thermal cycling tests, the method simulates the temperature changes experienced by the tiles in actual use, evaluating their tolerance to temperature fluctuations. Vacuum pretreatment tests simulate the vacuum conditions of space, verifying the stability and performance of the tiles under these conditions. Heat resistance tests directly test the tiles' ability to withstand high temperatures. By measuring dimensional and weight information before and after the tests, the changes in the physical properties of the tiles after a series of tests can be quantitatively assessed. During this process, changes in the dimensional information of the test specimens reflect the stability of the tile structure and its deformation under high temperature and vacuum environments, providing important data support for evaluating the reliability of the tiles. Changes in the weight of the test specimens reveal the ablation, volatilization, or moisture absorption of the tile material, providing data support for durability assessment. Simultaneously, performance data of the tiles under various extreme conditions can be obtained through thermal cycling tests, vacuum pretreatment tests, and heat resistance tests, providing a data foundation for optimizing the structural design of the tiles. Furthermore, by setting a first preset range and a second preset range, a clear evaluation standard is provided for assessing the reusability of the heat insulation tiles. The reusability of the heat insulation tiles can be evaluated by comparing the test results of the size and weight information of the first and second test specimens.

[0033] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0034] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure. It is obvious that the drawings described below are merely some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0035] Figure 1 This is a flowchart of the test method for the reusability performance of rigid thermal insulation tiles in the embodiments of this disclosure.

[0036] Figure 2 This is a schematic diagram of the first test piece, the second test piece, and the loading block in an embodiment of this disclosure.

[0037] Figure 3 This is the temperature loading curve of the cold and hot cycling test in the embodiments of this disclosure.

[0038] Figure 4 This is the temperature loading curve of the heat resistance test in the embodiments of this disclosure.

[0039] Figure 5 This is a schematic diagram of a thermocouple in an embodiment of this disclosure.

[0040] Figure 6 This is a schematic diagram of the test fixture for the tensile test in an embodiment of this disclosure.

[0041] In the figure: 1. First test piece; 2. Second test piece; 3. Thermocouple; 4. Loading block; 5. Fixing part; 51. Clamp; 52. Base plate; 53. U-shaped lug; 6. Connecting block; 7. Pin. Detailed Implementation

[0042] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore their detailed description will be omitted.

[0043] Although relative terms such as "up" and "down" are used in this specification to describe the relative relationship of one component of an icon to another, these terms are used only for convenience, such as according to the orientation of the examples shown in the accompanying drawings. It is understood that if the device of the icon is flipped upside down, the component described as "up" will become the component described as "down." When a structure is "up" of another structure, it may mean that the structure is integrally formed on the other structure, or that the structure is "directly" mounted on the other structure, or that the structure is "indirectly" mounted on the other structure through another structure.

[0044] The terms “a,” “one,” “the,” and “the” are used to indicate the existence of one or more elements / components / etc.; the terms “including” and “having” are used to indicate an open-ended inclusion and that other elements / components / etc. may exist in addition to those listed. The terms “first,” “second,” “third,” and “fourth” are used only as markers and are not a limitation on the number of objects.

[0045] This disclosure provides a test method for evaluating the reusability of rigid thermal insulation tiles, such as... Figure 1 As shown, the test method may include steps S110-S140, wherein:

[0046] Step S110: Provide a first test piece and a second test piece, wherein the first test piece and the second test piece have the same structure, size and material;

[0047] Step S120: Perform cold and hot cycling test, vacuum pretreatment test and heat resistance test on the first test piece in sequence, and measure the first dimension information and second weight information of the first test piece.

[0048] Step S130: Perform thermal cycling test, vacuum pretreatment test, heat resistance test, thermal cycling test, vacuum pretreatment test and heat resistance test on the second test piece in sequence, and measure the second dimension information and second weight information of the second test piece.

[0049] Step S140: When the difference between the second dimension information and the first dimension information is within a first preset range, it is determined that the reusability of the first test piece and the second test piece meets the preset standard; and / or, when the difference between the second weight information and the first weight information is within a second preset range, it is determined that the reusability of the first test piece and the second test piece meets the preset standard.

[0050] This disclosure discloses a reusable performance testing method for rigid thermal insulation tiles. Through thermal cycling tests, the method simulates the temperature changes experienced by the tiles in actual use, evaluating their tolerance to temperature fluctuations. Vacuum pretreatment tests simulate the vacuum conditions of space, verifying the stability and performance of the tiles under these conditions. Heat resistance tests directly test the tiles' ability to withstand high temperatures. By measuring dimensional and weight information before and after the tests, the changes in the physical properties of the tiles after a series of tests can be quantitatively assessed. During this process, changes in the dimensional information of the test specimens reflect the stability of the tile structure and its deformation under high temperature and vacuum environments, providing important data support for evaluating the reliability of the tiles. Changes in the weight of the test specimens reveal the ablation, volatilization, or moisture absorption of the tile material, providing data support for durability assessment. Simultaneously, performance data of the tiles under various extreme conditions can be obtained through thermal cycling tests, vacuum pretreatment tests, and heat resistance tests, providing a data foundation for optimizing the structural design of the tiles. Furthermore, by setting a first preset range and a second preset range, a clear evaluation standard is provided for assessing the reusability of the heat insulation tiles. The reusability of the heat insulation tiles can be evaluated by comparing the test results of the size and weight information of the first and second test specimens.

[0051] The following provides a detailed explanation of each step and specific details of the test method for the reusability of rigid thermal insulation tiles disclosed herein:

[0052] like Figure 1 As shown, in step S110, a first test piece and a second test piece are provided, and the first test piece and the second test piece have the same structure, size and material.

[0053] The first test piece 1 and the second test piece 2 can be two heat insulation tile test pieces with identical structure, material, and dimensions. For example... Figure 2As shown, both the first test piece 1 and the second test piece 2 can be block-shaped. Both can have a first surface and a second surface facing each other, and both can be planar and parallel to each other. For example, both can be cuboids, and the first and second surfaces can be the upper and lower surfaces of the cuboid-shaped first test piece 1 or second test piece 2, respectively. Both can be hollow structures, meaning both can have an outer surface and an inner surface.

[0054] like Figure 1 As shown, in step S120, the first test piece 1 is subjected to a cold and hot cycle test, a vacuum pretreatment test and a heat resistance test in sequence, and the first dimension information and the second weight information corresponding to the first test piece 1 are measured.

[0055] Before conducting various tests, the first test piece 1 can be photographed and weighed, and the weight information of the first test piece 1 before the test can be recorded. The length and width of the first surface of the first test piece 1, the length and width of the second surface of the first test piece 1, and the length and width of the middle part in the length direction of the first test piece 1 can also be measured and recorded.

[0056] First, a thermal cycling test can be conducted on the first test piece 1. After the thermal cycling test, the first test piece 1 can be photographed, its dimensions measured, and its weight recorded. Next, a vacuum pretreatment test can be performed on the first test piece 1. After the vacuum pretreatment test, the first test piece 1 can also be photographed, its dimensions measured, and its weight recorded. After the vacuum pretreatment test, a heat resistance test can be performed on the first test piece 1. After the heat resistance test, the first test piece 1 can be photographed, and its dimensions and weight measured. The dimensions of the first test piece 1 measured after the heat resistance test can be defined as the first dimension information, and the weight of the first test piece 1 measured after the heat resistance test can be defined as the first weight information.

[0057] like Figure 1 As shown, in step S130, the second test piece 2 is subjected to a thermal cycling test, a vacuum pretreatment test, a heat resistance test, a thermal cycling test, a vacuum pretreatment test, and a heat resistance test in sequence, and the second dimension information and the second weight information corresponding to the second test piece 2 are measured.

[0058] Before conducting various tests, the second test piece 2 can be photographed and weighed, and the weight information of the second test piece 2 before the test can be recorded. The length and width of the first surface of the second test piece 2, the length and width of the second surface of the second test piece 2, and the length and width of the middle part in the length direction of the second test piece 2 can also be measured and recorded.

[0059] First, a thermal cycling test can be conducted on the second test piece 2. After the thermal cycling test, the second test piece 2 can be photographed, its dimensions measured, and its weight recorded. Next, a vacuum pretreatment test can be performed on the second test piece 2. After the vacuum pretreatment test, the second test piece 2 can also be photographed, its dimensions measured, and its weight recorded. After the vacuum pretreatment test, a heat resistance test can be performed on the second test piece 2. After the heat resistance test, the second test piece 2 can be photographed, and its dimensions and weight measured. The thermal cycling test, vacuum pretreatment test, and heat resistance test can be repeated on the second test piece 2 at least once. The dimensions of the second test piece 2 measured after the last repeated test can be defined as the second dimension information, and the weight of the second test piece 2 measured after the last repeated test can be defined as the second weight information.

[0060] like Figure 1 As shown, in step S140, when the difference between the second size information and the first size information is within a first preset range, it is determined that the reusability of the first test piece 1 and the second test piece 2 meets the preset standard; and / or, when the difference between the second weight information and the first weight information is within a second preset range, it is determined that the reusability of the first test piece 1 and the second test piece 2 meets the preset standard.

[0061] The first preset range can be a range set according to the actual situation of the heat insulation tile. For example, the first preset range can be 0 to 5 mm. That is, when the difference between the second dimension information and the first dimension information is within 0 to 5 mm, it can be determined that the reusability performance of the first test piece 1 and the second test piece 2 meets the preset standard.

[0062] The second preset range can be a range set according to the actual situation of the heat insulation tile. For example, the second preset range can be 0 to 100g. That is, when the difference between the second weight information and the first weight information is within 0 to 100g, it can be determined that the reusability performance of the first test piece 1 and the second test piece 2 meets the preset standard.

[0063] Alternatively, when the difference between the second dimension information and the first dimension information is within 0 to 5 mm, and the difference between the second weight information and the first weight information is within 0 to 100 g, it can be determined that the reusability of the first test piece 1 and the second test piece 2 meets the preset standard.

[0064] In this disclosure, by setting a first preset range and a second preset range, a clear evaluation standard is provided for assessing the reusability of the heat insulation tile. The reusability of the heat insulation tile can be evaluated by comparing the test results of the size and weight information of the first test piece 1 and the second test piece 2.

[0065] In one exemplary embodiment of this disclosure, the test method for the reusability performance of rigid thermal insulation tiles may further include steps S210-S240, wherein:

[0066] Step S210: Provide a third test piece and a fourth test piece, wherein the third test piece and the fourth test piece have the same structure, size and material.

[0067] The third and fourth test pieces can be two heat insulation tile test pieces with identical structure, material, and dimensions. The structure of the third and fourth test pieces can be the same as that of the first test piece 1, and their dimensions can be different from or the same as those of the first test piece 1, without any special restrictions.

[0068] Step S220: Perform a thermal cycling test, a vacuum pretreatment test, and a tensile test on the third test piece in sequence, and measure the third dimension information and the third weight information of the third test piece.

[0069] Before conducting any tests, the third test piece can be photographed and weighed, and its weight information before the test can be recorded. The length and width of the first side and the second side of the third test piece can also be measured and recorded. At the same time, the length and width of the middle part of the third test piece in the length direction can also be measured and recorded.

[0070] First, a thermal cycling test can be conducted on the third test piece. After the thermal cycling test, the third test piece can be photographed, its dimensions measured, and its weight recorded. Next, a vacuum pretreatment test can be performed on the third test piece. After the vacuum pretreatment test, the third test piece can also be photographed, its dimensions measured, and its weight recorded. After the vacuum pretreatment test, a tensile test can be performed on the third test piece. After the tensile test, the third test piece can be photographed, and its dimensions and weight measured can be defined as the third dimensional information, and the weight measured after the tensile test can be defined as the third weight information.

[0071] Step S230: Perform a thermal cycling test, a vacuum pretreatment test, a thermal cycling test, a vacuum pretreatment test, and a tensile test on the fourth test piece in sequence, and measure the fourth dimension information and the fourth weight information corresponding to the fourth test piece.

[0072] Before conducting various tests, the fourth test piece can be photographed and weighed, and its weight information before the test can be recorded. The length and width of the first side and the second side of the fourth test piece can also be measured and recorded. At the same time, the length and width of the middle part of the fourth test piece in the length direction can also be measured and recorded.

[0073] First, a thermal cycling test can be conducted on the fourth test piece. After the thermal cycling test, the fourth test piece can be photographed, its dimensions measured, and its weight recorded. Next, a vacuum pretreatment test can be performed on the fourth test piece. After the vacuum pretreatment test, the fourth test piece can also be photographed, its dimensions measured, and its weight recorded. After the vacuum pretreatment test, the thermal cycling test and the vacuum pretreatment test can be repeated at least once. Then, a tensile test can be performed on the fourth test piece. After the tensile test, the fourth test piece can be photographed, and its dimensions and weight measured. The dimensions of the fourth test piece measured after the tensile test can be defined as the fourth dimensional information, and the weight of the fourth test piece measured after the tensile test can be defined as the fourth weight information.

[0074] Step S240: When the difference between the fourth dimension information and the third dimension information is within a third preset range, it is determined that the reusability of the third test piece and the fourth test piece meets the preset standard; and / or, when the difference between the third weight information and the fourth weight information is within a fourth preset range, it is determined that the reusability of the third test piece and the fourth test piece meets the preset standard.

[0075] The third preset range can be a range set according to the actual situation of the heat insulation tile. For example, the third preset range can be 0 to 5 mm. That is, when the difference between the fourth dimension information and the third dimension information is within 0 to 5 mm, it can be determined that the reusability performance of the third test piece and the fourth test piece meets the preset standard.

[0076] The fourth preset range can be a range set according to the actual situation of the heat insulation tile. For example, the fourth preset range can be 0 to 100g. That is, when the difference between the fourth weight information and the third weight information is within 0 to 100g, it can be determined that the reusability performance of the third test piece and the fourth test piece meets the preset standard.

[0077] Alternatively, if the difference between the fourth dimension information and the third dimension information is within 0 to 5 mm, and the difference between the fourth weight information and the third weight information is within 0 to 100 g, it can be determined that the reusability of the third and fourth test pieces meets the preset standard.

[0078] In some embodiments of this disclosure, the thermal cycling test may include steps S1 and S2, wherein:

[0079] S1, heat the first test piece 1, the second test piece 2, the third test piece or the fourth test piece to a first preset temperature and keep them at that temperature for a first preset time, wherein the first preset temperature is greater than 100°C.

[0080] A liquid nitrogen environment chamber can be used to conduct thermal cycling tests on each test piece (e.g., test piece 1, test piece 2, test piece 3, or test piece 4). The temperature loading curve for the thermal cycling pretreatment test can be set through the control panel of the thermal cycling equipment (e.g., ...). Figure 3 As shown), this allows each test piece to automatically heat from room temperature to a first preset temperature and maintain that temperature for a first preset time.

[0081] In one exemplary embodiment of this disclosure, the first preset temperature can be 120°C to 140°C, for example, it can be 120°C, 125°C, 130°C, 135°C or 140°C, and of course, it can also be other temperatures, which will not be listed here.

[0082] In one exemplary embodiment of this disclosure, the first preset duration can be 8 min to 12 min, for example, it can be 8 min, 9 min, 10 min, 11 min or 12 min, and of course, it can also be other durations, which will not be listed here.

[0083] S2, the first test piece 1, the second test piece 2, the third test piece or the fourth test piece are lowered from the first preset temperature to the second preset temperature and maintained for the second preset time, wherein the second preset temperature is less than -30℃;

[0084] After the test specimen (e.g., the first test specimen 1, the second test specimen 2, the third test specimen, or the fourth test specimen) is kept at a certain temperature for a first preset time, the test specimen can be cooled from the first preset temperature to a second preset temperature and held for the second preset time. In an exemplary embodiment of this disclosure, the second preset temperature can be -40℃ to -60℃, for example, it can be -40℃, -45℃, -50℃, -55℃, or -60℃. Of course, it can also be other temperatures, which will not be listed here.

[0085] In one exemplary embodiment of this disclosure, the second preset duration can be 8 min to 12 min, for example, it can be 8 min, 9 min, 10 min, 11 min or 12 min, and of course, it can also be other durations, which will not be listed here.

[0086] Steps S1-S2 can be repeated a preset number of times to more realistically simulate the working conditions of the aircraft. For example, the preset number of times can be 110 to 130 times, such as 110, 115, 120, 125 or 130 times.

[0087] In one exemplary embodiment of this disclosure, the vacuum pretreatment test includes:

[0088] The test specimens (e.g., the first test specimen 1, the second test specimen 2, the third test specimen, or the fourth test specimen) are placed in a vacuum container. The test pressure and test time are set through the control panel of the vacuum equipment. For example, the pressure of the vacuum container can be set to less than 1.3 × 10⁻⁵ Pa. The duration of the vacuum pretreatment test can be set to 1 to 2 days; for example, the duration can be 1 day, 1.5 days, or 2 days. After the vacuum pretreatment test is completed, the test specimens can be photographed, and their dimensional and weight information recorded.

[0089] In one exemplary embodiment of this disclosure, the heat resistance test may include steps S310 and S320, wherein:

[0090] Step S310: Place the first test piece 1 or the second test piece 2 on the test bracket, which is connected to the heating rod.

[0091] The surface of either the first test specimen 1 or the second test specimen 2 can be cleaned, and the cleaned specimen can be placed on a test stand in the heat resistance testing equipment. This test stand supports the test specimen, and the surface of the test stand furthest from the test specimen is connected to the heating rod. The surface of the test stand can be provided with a heat insulation pad, which has an opening extending through the pad along its thickness. The shape of the opening is the same as the cross-sectional shape of the test specimen, but its size is larger than the outer perimeter of the test specimen. The test specimen can be placed inside the opening. Additionally, heat insulation cotton can be wrapped around the outer perimeter of the test specimen to prevent heat diffusion within the test specimen from affecting the accuracy of the test results during the test.

[0092] Step S320: The first test piece 1 or the second test piece 2 is heated to a third preset temperature by the heating rod, and then cooled after being kept at that temperature for a third preset time.

[0093] like Figure 4 As shown, the test specimen (e.g., the first test specimen 1 or the second test specimen 2) on the test stand can be heated by a heating rod to bring the temperature of the test specimen to a third preset temperature and maintain it for a third preset duration. In some embodiments of this disclosure, the third preset temperature can be 500℃ to 600℃, for example, it can be 500℃, 550℃ or 600℃. Of course, the third preset temperature can also be other values, which will not be listed here. In some embodiments of this disclosure, the third preset duration can be 80 seconds to 100 seconds, for example, it can be 80 seconds, 85 seconds, 90 seconds, 95 seconds or 100 seconds.

[0094] In one exemplary embodiment of this disclosure, such as Figure 5 As shown, before conducting the heat resistance test, multiple thermocouples 3 can be adhered to the cleaned first test piece 1 or second test piece 2. For example, thermocouples 3 can be adhered to each surface of the test piece. For instance, a thermocouple 3 can be adhered to the center position of the outer surface of any side of the test piece, a thermocouple 3 can be adhered to the middle position between the center position and the top surface, a thermocouple 3 can be adhered to the middle position between the center position and the bottom surface, a thermocouple 3 can be adhered to the middle position between the center position and one side surface, and a thermocouple 3 can be adhered to the middle position between the center position and the other side surface. At the same time, thermocouples 3 can also be adhered to the corresponding positions on the inner surface and the outer surface. The temperature value at the adhesion position can be detected by the thermocouples 3. After the test piece is kept warm for a third preset time, the heat insulation performance of the heat insulation tile can be judged by comparing the temperature values ​​of the corresponding outer and inner surfaces at each point.

[0095] In one exemplary embodiment of this disclosure, the tensile test includes steps S410-S430, wherein:

[0096] Step S410: The upper and lower surfaces of the third or fourth test piece are bonded to different loading blocks 4 using adhesive, and then cured at a fourth preset temperature.

[0097] The adhesive can be an epoxy resin, for example, DG-3 adhesive. Please see below. Figure 2 As shown, the first side of the third test piece (or the fourth test piece) can be bonded to a loading block 4 using adhesive, and simultaneously, the second side of the third test piece (or the fourth test piece) can be bonded to another loading block 4. The adhesive can be cured for 4 hours at a fourth preset temperature. The fourth preset temperature is 50℃ to 70℃, for example, it can be 50℃, 55℃, 60℃, 65℃ or 70℃, and of course, other temperatures are also possible, which will not be listed here.

[0098] Step S420: Install the third test piece with the loading block 4 attached or the fourth test piece with the loading block 4 attached onto the test fixture of the testing machine.

[0099] After the adhesive has cured, the third (or fourth) test piece with the loading block 4 bonded to it can be assembled onto the test fixture, such as... Figure 6 As shown, the test fixture may include two fixing parts 5 and two connecting blocks 6. The fixing parts 5 may include a chuck 51, a base plate 52, and two U-shaped lugs 53. The chuck 51 may be rod-shaped, with one end connected to the surface of the base plate 52. The two U-shaped lugs 53 are located on the side of the base plate 52 away from the chuck 51 and are connected to the surface of the base plate 52 away from the chuck 51. The two U-shaped lugs 53 are spaced apart and parallel to each other in a direction parallel to the base plate 52. The connecting blocks 6 can extend between the two U-shaped lugs 53. After the U-shaped lugs 53 and the connecting blocks 6 are connected by pins 7, the chuck 51 and the U-shaped lugs 53 can rotate freely around the mutually perpendicular pins 7, thereby ensuring the automatic centering of the test fixture, with the cylindrical clamping areas of the upper and lower chucks 51 located on the same axis. The loading block 4 is fixedly connected to the connecting block 6 using bolts. It should be noted that the connection method between the loading blocks 4 and the connecting blocks 6 at both ends of the third test piece (or the fourth test piece) is the same.

[0100] Step S430: Apply a tensile load to the third test piece or the fourth test piece at a preset loading rate until the third test piece or the fourth test piece is destroyed.

[0101] A load can be applied to the third (or fourth) test specimen using a test fixture. For example, a load can be applied to the third (or fourth) test specimen at a loading rate of 0.5 mm / min until the third (or fourth) test specimen is destroyed. At this point, the tensile strength of the third (or fourth) test specimen at the point of destruction can be recorded. The third (or fourth) test specimen after the tensile test can be photographed to record the failure mode of the third (or fourth) test specimen.

[0102] In one exemplary embodiment of this disclosure, tensile strength can be calculated using the following formula:

[0103]

[0104] in:

[0105] σ: Tensile strength, in MPa;

[0106] F: Failure load, in N;

[0107] A: Cross-sectional area of ​​the test specimen, in mm. 2 .

[0108] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the appended claims.

Claims

1. A test method for the reusability performance of rigid thermal insulation tiles, characterized in that, include: A first test specimen and a second test specimen are provided, wherein the first test specimen and the second test specimen are identical in structure, size and material. The first test piece was subjected to a cold and hot cycle test, a vacuum pretreatment test, and a heat resistance test in sequence, and the first dimension information and the first weight information of the first test piece were measured. The second test piece was subjected to a series of tests in sequence: thermal cycling test, vacuum pretreatment test, heat resistance test, thermal cycling test, vacuum pretreatment test, and heat resistance test. The second dimension information and second weight information of the second test piece were measured. When the difference between the second dimension information and the first dimension information is within a first preset range, it is determined that the reusability of the first test piece and the second test piece meets the preset standard; and / or, when the difference between the second weight information and the first weight information is within a second preset range, it is determined that the reusability of the first test piece and the second test piece meets the preset standard.

2. The test method according to claim 1, characterized in that, The testing method also includes: A third test specimen and a fourth test specimen are provided, wherein the third test specimen and the fourth test specimen are identical in structure, size and material; The third test piece was subjected to a thermal cycling test, a vacuum pretreatment test, and a tensile test in sequence, and the third dimension information and the third weight information of the third test piece were measured. The fourth test piece was subjected to a thermal cycling test, a vacuum pretreatment test, a thermal cycling test, a vacuum pretreatment test, and a tensile test in sequence, and the fourth dimension information and the fourth weight information of the fourth test piece were measured. When the difference between the fourth dimension information and the third dimension information is within a third preset range, it is determined that the reusability of the third test piece and the fourth test piece meets the preset standard; and / or, when the difference between the third weight information and the fourth weight information is within a fourth preset range, it is determined that the reusability of the third test piece and the fourth test piece meets the preset standard.

3. The test method according to claim 2, characterized in that, The thermal cycling test includes the following steps: S1, heat the first test piece, the second test piece, the third test piece or the fourth test piece to a first preset temperature and keep it at that temperature for a first preset time, wherein the first preset temperature is greater than 100°C; S2, the first test piece, the second test piece, the third test piece or the fourth test piece are lowered from the first preset temperature to the second preset temperature and maintained for the second preset time, wherein the second preset temperature is less than -30°C; Repeat steps S1-S2 a preset number of times.

4. The test method according to claim 3, characterized in that, The first preset temperature is 120℃~140℃; the second preset temperature is -40℃~-60℃.

5. The test method according to claim 3, characterized in that, The first preset duration and the second preset duration are both 8 min to 12 min, and the preset number of times is 110 to 130.

6. The test method according to claim 2, characterized in that, The vacuum pretreatment test includes: The first test piece, the second test piece, the third test piece, or the fourth test piece are placed inside a vacuum container, and the pressure of the vacuum container is set to be less than 1.3 × 10⁻⁶. -5 Pa; the duration of the vacuum pretreatment test is 1 to 2 days.

7. The test method according to claim 1, characterized in that, The heat resistance test includes: The first or second test piece is placed on a test stand, which is connected to a heating rod. The first or second test piece is heated to a third preset temperature using the heating rod, and then cooled after being kept at that temperature for a third preset time.

8. The test method according to claim 7, characterized in that, The third preset temperature is 500℃~600℃, and the third preset duration is 80 seconds~100 seconds.

9. The test method according to claim 2, characterized in that, The tensile test includes: The upper and lower surfaces of the third or fourth test piece are bonded to different loading blocks using adhesive, and then cured at a fourth preset temperature. The third test piece with the loading block bonded to it or the fourth test piece with the loading block bonded to it is mounted on the test fixture of the testing machine. A tensile load is applied to the third or fourth test piece at a preset loading rate until the third or fourth test piece is destroyed.

10. The test method according to claim 9, characterized in that, The fourth preset temperature is 50℃~70℃.

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