A load bearing structure based on dissimilar materials and method of manufacture

Abstract

The application belongs to the technical field of aerospace structure and specifically relates to a bearing structure based on heterogeneous materials and a manufacturing method. The bearing structure based on heterogeneous materials comprises a high modulus base used for mounting a detection system component and a position information measurement system component, and a high damping base sleeved outside the high modulus base and used for being connected with a spacecraft. The high damping base is connected with the high modulus base through a physical interlocking structure, and an area where the physical interlocking structure is located is defined as a transition area. In the transition area, the high damping base and the high modulus base are nested with each other. The application breaks the performance limitation of a single material through combined application of heterogeneous materials, realizes multifunctional integration of light weight, high stiffness, high vibration suppression and the like, and obtains a light high modulus heterogeneous material high stability structure.

Description

Technical Field

[0001] This invention belongs to the field of aerospace structural technology, specifically relating to a load-bearing structure based on heterogeneous materials and its manufacturing method. Background Technology

[0002] The contradiction between the precision and stability of aerospace exploration and guidance equipment and its need for lightweight design and operation in extreme dynamic environments is significant. Most existing aerospace structures rely on a single material, such as TC4 titanium alloy, which has high elastic modulus and mechanical properties but lacks damping capabilities. This means that under conditions of high impact and strong vibration, existing aerospace load-bearing structures will still experience substantial deformation. Conversely, using only a single material with high damping ratio lacks the necessary high modulus and stiffness.

[0003] This makes it difficult for existing aerospace structures to simultaneously achieve multi-functional integration of lightweight, high modulus, and high damping. Summary of the Invention

[0004] The purpose of this invention is to address the problem that existing aerospace structures cannot simultaneously achieve the integration of multiple functions such as lightweight, high modulus, and high damping, by providing a load-bearing structure and manufacturing method based on heterogeneous materials.

[0005] On one hand, the present invention provides a load-bearing structure based on heterogeneous materials, including

[0006] High-modulus base for mounting detection system components and location information measurement system components; and

[0007] A high-damping base is fitted onto the outside of the high-modulus base, and the high-damping base is used to connect to the spacecraft;

[0008] The high-damping base is connected to the high-modulus base through a physical interlocking structure, and the area where the physical interlocking structure is located is defined as a transition region; within the transition region, the high-damping base and the high-modulus base are nested together.

[0009] Furthermore, the high-modulus base is a TC4 titanium alloy base.

[0010] Furthermore, the transition area is provided with a plurality of high-damping supports and a plurality of high-modulus supports, all of which are integrally formed with the high-damping base and all of which are integrally formed with the high-modulus base.

[0011] All the high-damping supports are arranged at circumferential intervals along the high-damping base, and all the high-modulus supports are arranged at circumferential intervals along the high-modulus base, with each high-modulus support fitting within the gap between two high-damping supports.

[0012] Furthermore, the high-damping branches and high-modulus branches within the transition region are physically interlocked.

[0013] Furthermore, the high-damping base is a shape memory alloy base.

[0014] Furthermore, the shape memory alloy base is a Ni-Ti alloy base.

[0015] Furthermore, it also includes a detection system mounting structure fixed on the high-modulus base.

[0016] Furthermore, it also includes a position information measurement system mounting structure fixed on the high-modulus base.

[0017] On the other hand, the present invention also provides a method for manufacturing a load-bearing structure based on heterogeneous materials, for manufacturing the aforementioned load-bearing structure based on heterogeneous materials, comprising the following steps:

[0018] S1, heat the high-damping branch and cause the structure of the high-damping branch to undergo a martensitic phase transformation to transform into an austenitic phase;

[0019] S2, when the high-damping support structure is in the austenitic phase state, an external load is applied to the high-damping support, and its superelasticity is used to cause the high-damping support to deform.

[0020] S3, Under the condition that the high damping branch deforms, the high damping branch and the high modulus branch are assembled to form a physical interlocking structure.

[0021] S4, lower the temperature to return the high-damping support structure to the martensitic state.

[0022] Furthermore, it also includes step S0,

[0023] S0, high-modulus support on high-modulus base is processed using selective laser melting forming technology, and high-damping support on high-damping base is processed using selective laser melting forming technology.

[0024] The beneficial effects of this invention are as follows:

[0025] To resolve the contradiction between high structural stability and extreme dynamic service environments in detection and guidance equipment, a novel design approach is necessary.

[0026] This invention provides a load-bearing structure based on heterogeneous materials (hereinafter referred to as "this structure"), which breaks the existing application mode of using only a single material. It innovatively adopts an application mode that combines high modulus materials and high damping materials, so that the load-bearing structure provided by this invention can simultaneously achieve the multi-functional integration of lightweight, high modulus and high damping.

[0027] Based on the performance requirements of each region within the structure, this design employs a high-damping base in the connection areas subjected to severe impact and vibration inputs. Utilizing the high damping performance and dynamic characteristics of the high-damping base, a biomimetic microstructure composite application method can be designed. By comprehensively utilizing the high designability of the high-damping base and the microstructure in terms of variable modulus, variable damping, and cross-scale, modal control in different regions can be achieved, thus realizing vibration reduction and dynamic stability in the transition region. In the deformation-resistant installation areas, a high-modulus base is used, leveraging its high modulus performance to ensure high structural stiffness.

[0028] In summary, this structure, through the combined application of heterogeneous materials, breaks through the performance limitations of single materials, achieving a multi-functional integration of lightweight, high stiffness, and high vibration damping, resulting in a lightweight, high-modulus, and highly stable heterogeneous material structure. This structure is an ideal technical approach to solving the contradiction between the structural accuracy and stability of detection and guidance equipment and the extreme dynamic service environment, and can provide support for improving equipment performance. Attached Figure Description

[0029] Figure 1 This is a three-dimensional structural diagram of the load-bearing structure based on heterogeneous materials in this embodiment.

[0030] Figure 2 This is a cross-sectional schematic diagram of the load-bearing structure based on heterogeneous materials in this embodiment.

[0031] Figure label:

[0032] 1-High damping base; 2-High modulus base; 3-Detection system installation structure; 4-Position information measurement system installation structure; 5-Physical interlocking structure. Detailed Implementation

[0033] The present invention will be further described in detail below with reference to experimental examples and specific embodiments. However, this should not be construed as limiting the scope of the above-mentioned subject matter of the present invention to the following embodiments; all technologies implemented based on the content of the present invention fall within the scope of the present invention.

[0034] Existing aerospace structures struggle to simultaneously achieve multi-functional integration of lightweight, high modulus, and high damping. This embodiment provides a load-bearing structure and manufacturing method based on heterogeneous materials. By combining heterogeneous materials, the performance limitations of single materials are overcome, achieving integrated integration of lightweight, high stiffness, and high vibration damping, resulting in a lightweight, high-modulus, and highly stable heterogeneous material structure.

[0035] First, this embodiment provides a load-bearing structure based on heterogeneous materials.

[0036] like Figure 1 and Figure 2As shown, the load-bearing structure based on heterogeneous materials provided in this embodiment includes a high-modulus base 2, a high-damping base 1, a physical interlocking structure 5, a detection system mounting structure 3, and a position information measurement system mounting structure 4.

[0037] The high-damping base 1 is fitted outside the high-modulus base 2, and the high-damping base 1 is connected to the high-modulus base 2 through a physical interlocking structure 5. The area where the physical interlocking structure 5 is located is defined as the transition region; within the transition region, the high-damping base 1 and the high-modulus base 2 are nested together.

[0038] In this embodiment, a number of high-damping supports and a number of high-modulus supports are provided in the transition area. All high-damping supports are integrally formed with the high-damping base 1, and all high-modulus supports are integrally formed with the high-modulus base 2. All high-damping supports are arranged at intervals along the circumference of the high-damping base 1, and all high-modulus supports are arranged at intervals along the circumference of the high-modulus base 2. Each high-modulus support is adapted to fit within the gap between two high-damping supports.

[0039] Furthermore, the high-damping and high-modulus supports within the transition region can be physically interlocked to further enhance the structural damping function.

[0040] In this embodiment, the high-damping base 1 is used to connect to the spacecraft, and the high-damping base 1 is the main load-bearing area of ​​the heterogeneous material-based load-bearing structure provided in this embodiment. The high-damping base 1 is also the input area for dynamic loads such as strong vibration and impact. Preferably, the high-damping base 1 can be a ring-shaped structure.

[0041] In this embodiment, the high-damping base 1 is preferably made of shape memory alloy. More specifically, the high-damping base 1 can be made of Ni-Ti alloy material with high damping characteristics, thereby enabling the structure of the high-damping base 1 to have advantages such as high vibration resistance and mechanical strength. This not only ensures that the load-bearing structure based on heterogeneous materials provided in this embodiment has good impact resistance and stability under strong vibration and impact, but also ensures that the load-bearing structure based on heterogeneous materials provided in this embodiment has high strength, so as to ensure that the structure is not damaged in a strong vibration and impact environment.

[0042] In this embodiment, the high-modulus base 2 has extremely high requirements for structural stability. Its main function is to support the detection system mounting structure 3 and the position information measurement system mounting structure 4. In this embodiment, the high-modulus base 2 is preferably made of high-modulus TC4 titanium alloy, and its high modulus properties are utilized to achieve high structural rigidity, giving the high-modulus base 2 good resistance to deformation.

[0043] In this embodiment, the detection system mounting structure 3 and the position information measurement system mounting structure 4 are placed on the high-modulus base 2, mainly for realizing photoelectric detection and guidance functions, and the structural stability requirements are extremely high. Preferably, the detection system mounting structure 3 and the position information measurement system mounting structure 4 can also be made of TC4 titanium alloy.

[0044] In this embodiment, to ensure the stability of the structure, laser selective melting forming technology can be used to integrate the three parts: the high-modulus TC4 titanium alloy detection system mounting structure 3, the high-modulus TC4 titanium alloy position information measurement system mounting structure 4, and the high-modulus base 2.

[0045] In this embodiment, the physical interlocking structure 5 is essentially a local region formed by the physical interlocking micro-configuration. Its main purpose is to create a transition region between dissimilar materials, thereby achieving both discrete design of interface stress and integrated connection of the two material structures, thus improving the overall structural stiffness. Preferably, the height of both the high-damping support and the high-modulus support can be 3mm to 4mm.

[0046] Furthermore, in the physical interlocking structure 5, the high-modulus support on the high-modulus base 2 can be processed using laser selective melting forming technology, and the high-damping support on the high-damping base 1 can be processed using laser selective melting forming technology.

[0047] During operation, the high-damping base 1 serves as the main load-bearing component of the entire structure, acting as the input point for vibration and impact loads. Utilizing the high damping and high strength characteristics of Ni-Ti alloy, it reduces the magnitude of vibration response, meeting the overall structure's requirements for high vibration suppression and high mechanical performance. The high-modulus base 2, located inside the Ni-Ti titanium alloy base, primarily supports the detection system mounting structure 3 and the position information measurement system mounting structure 4, requiring extremely high structural stiffness. By employing high-modulus TC4 titanium alloy, its high modulus characteristics achieve high structural stiffness and good resistance to deformation.

[0048] In other words, the load-bearing structure based on heterogeneous materials provided in this embodiment can break through the performance limitations of a single material by combining heterogeneous materials, and achieve the integration of multiple functions such as lightweight, high stiffness, and high vibration suppression, to obtain a lightweight, high-modulus, highly stable heterogeneous material structure. This is an ideal technical approach to solve the contradiction between the structural accuracy and stability of detection and guidance equipment and the extreme dynamic service environment.

[0049] Secondly, this embodiment also provides a method for manufacturing a load-bearing structure based on heterogeneous materials, characterized in that: the method for processing the above-mentioned load-bearing structure based on heterogeneous materials specifically includes the following steps:

[0050] S0, the high modulus support on the high modulus base 2 is processed by laser selective melting forming technology, the high damping support on the high damping base 1 is processed by laser selective melting forming technology, and the detection system installation structure 3, the position information measurement system installation structure 4 and the high modulus base 2 are integrated into one piece by laser selective melting forming technology.

[0051] Among them, the high-damping base 1 and the high-damping support are both Ni-Ti titanium alloy, while the detection system mounting structure 3, the position information measurement system mounting structure 4, the high-modulus support and the high-modulus base 2 are all TC4 titanium alloy.

[0052] S1, heat the high-damping branch and cause the structure of the high-damping branch to undergo a martensitic phase transformation to transform into an austenitic phase.

[0053] S2, when the high-damping support structure is in the austenitic phase state, an external load is applied to the high-damping support, and its superelasticity is used to cause the high-damping support to deform.

[0054] S3, under the condition that the high-damping branch deforms, assemble the high-damping branch and the high-modulus branch to form a physically interlocked structure.

[0055] S4, lowering the temperature to return the high-damping support structure to the martensitic state, has completed the fabrication of the load-bearing structure based on heterogeneous materials.

[0056] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A load-bearing structure based on heterogeneous materials, characterized in that: include High-modulus base for mounting detection system components and location information measurement system components; as well as A high-damping base is fitted onto the outside of the high-modulus base, and the high-damping base is used to connect to the spacecraft; The high-damping base is connected to the high-modulus base through a physical interlocking structure, and the area where the physical interlocking structure is located is defined as a transition region; within the transition region, the high-damping base and the high-modulus base are nested together. The transition area is provided with a number of high-damping supports and a number of high-modulus supports. All the high-damping supports are integrally formed with the high-damping base, and all the high-modulus supports are integrally formed with the high-modulus base. All the high-damping supports are arranged at circumferential intervals along the high-damping base, and all the high-modulus supports are arranged at circumferential intervals along the high-modulus base, with each high-modulus support fitting within the gap between two high-damping supports.

2. The load-bearing structure based on heterogeneous materials according to claim 1, characterized in that: The high-modulus base is a TC4 titanium alloy base.

3. The load-bearing structure based on heterogeneous materials according to claim 1, characterized in that: The high-damping and high-modulus branches within the transition region are physically interlocked.

4. The load-bearing structure based on heterogeneous materials according to claim 3, characterized in that: The high-damping base is a shape memory alloy base.

5. The load-bearing structure based on heterogeneous materials according to claim 4, characterized in that: The shape memory alloy base is a Ni-Ti alloy base.

6. The load-bearing structure based on heterogeneous materials according to any one of claims 1-5, characterized in that: It also includes a detection system mounting structure fixed on the high-modulus base.

7. The load-bearing structure based on heterogeneous materials according to any one of claims 1-5, characterized in that: It also includes a position information measurement system mounting structure fixed on the high-modulus base.

8. A method for manufacturing a load-bearing structure based on heterogeneous materials, characterized in that: The method for manufacturing a load-bearing structure based on heterogeneous materials according to claim 4 or 5 includes the following steps: S1, heat the high-damping branch and cause the structure of the high-damping branch to undergo a martensitic phase transformation to transform into an austenitic phase; S2, when the high-damping support structure is in the austenitic phase state, an external load is applied to the high-damping support, and its superelasticity is used to cause the high-damping support to deform. S3, Under the condition that the high damping branch deforms, the high damping branch and the high modulus branch are assembled to form a physical interlocking structure. S4, lower the temperature to return the high-damping support structure to the martensitic state.

9. The method for manufacturing a load-bearing structure based on heterogeneous materials according to claim 8, characterized in that: It also includes step S0, S0, high-modulus support on high-modulus base is processed using selective laser melting forming technology, and high-damping support on high-damping base is processed using selective laser melting forming technology.

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