Mixed lattice dot matrix metamaterial structure

Abstract

The embodiment of the invention relates to the technical field of energy absorption metamaterial structures, and discloses a mixed lattice lattice metamaterial structure which comprises a plurality of lattice structure unit cells which are sequentially arranged in the X direction, the Y direction and the Z direction to form a lattice metamaterial unit. Each lattice structure unit cell comprises a cubic truss, a transition rod and a supporting column, and the two ends of the transition rod are connected with the cubic truss and the supporting column respectively. According to the embodiment, the problem that the energy absorption capacity of a stretching dominant structure is reduced due to unstable stress-strain response in the nonlinear stage is effectively solved, and through the unique structural design, the yield resistance of the structure in the initial loading stage is enhanced, so that the structure can bear external loads more stably.

Description

Technical Field

[0001] This embodiment relates to the technical field of energy-absorbing metamaterial structures, and in particular, to a hybrid lattice metamaterial structure. Background Art

[0002] Classical lattice structures such as body-centered cubic (BCC) and face-centered cubic (FCC) have been widely studied and applied. However, traditional BCC and FCC structures still have certain limitations in practical applications.

[0003] For example, BCC structures have relatively low energy absorption capacity and flow stress levels due to the limitations of their inclined strut structure, while FCC structures have poor stability under high strain conditions. The unsteady stress-strain response results in uneven energy dissipation during deformation. Energy dissipation is concentrated in areas of stress fluctuation or localized strain, while less energy is dissipated in other areas, resulting in a decrease in overall energy absorption efficiency. When a structure buckles locally, most of the energy is dissipated in the buckled region, while other unbuckled areas fail to effectively participate in energy absorption.

[0004] Furthermore, excessively concentrated energy accumulation can lead to premature localized structural failure, causing member fractures or joint disconnections, reducing the structure's overall load-bearing capacity and rendering it unable to absorb further energy. In a tension-dominated structure, if a key member fractures, the entire structure rapidly loses stability, prematurely terminating the energy absorption process.

[0005] Therefore, it is necessary to design a hybrid lattice metamaterial structure to solve the problems existing in current technology. Summary of the Invention

[0006] In view of this, this embodiment proposes a hybrid lattice metamaterial structure, which aims to solve the problem of decreased absorption capacity of the tensile-dominant structure due to the existence of an unstable stress-strain response in the nonlinear stage, thereby effectively improving the initial yield stress and energy absorption efficiency of the structure, as well as the flow stress level under axial compression conditions.

[0007] This embodiment proposes a hybrid lattice metamaterial structure, including:

[0008] The lattice structure unit cell has a plurality of lattice structure unit cells, and the plurality of lattice structure unit cells are arranged in sequence along the X, Y, and Z directions to form a lattice metamaterial unit; wherein the lattice structure unit cell includes a cube truss, a transition rod and a pillar, and the two ends of the transition rod are respectively connected to the cube truss and the pillar.

[0009] Furthermore, the cubic truss comprises:

[0010] The first equally divided truss, the second equally divided truss, the third equally divided truss and the fourth equally divided truss are connected end to end in a clockwise or counterclockwise direction to form a closed cubic frame.

[0011] Furthermore, the transition rod includes a first transition rod, a second transition rod, a third transition rod and a fourth transition rod.

[0012] Furthermore, there are four first transition rods, and every two first transition rods constitute a first transition rod group, and the two first transition rod groups are symmetrically arranged on both sides of the first equally divided truss in the vertical direction; one end of the first transition rod group is connected to the two ends of the first equally divided truss in the horizontal direction, and the other end is connected to the support column;

[0013] An isosceles triangle structure is formed between the first transition rod group and the first equally divided truss.

[0014] Furthermore, there are four second transition rods, and every two second transition rods constitute a second transition rod group. The two second transition rod groups are symmetrically arranged on both sides of the second equally divided truss in the vertical direction; one end of the second transition rod group is connected to the two ends of the second equally divided truss in the horizontal direction, and the other end is connected to the support.

[0015] An isosceles triangle structure is formed between the second transition rod group and the second equally divided truss.

[0016] Furthermore, there are four third transition rods, and every two third transition rods constitute a third transition rod group. The two third transition rod groups are symmetrically arranged on both sides of the third equally divided truss in the vertical direction; one end of the third transition rod group is connected to the two ends of the third equally divided truss in the horizontal direction, and the other end is connected to the support.

[0017] An isosceles triangle structure is formed between the third transition rod group and the third equally divided truss.

[0018] Furthermore, there are four fourth transition rods, and every two of the fourth transition rods constitute a fourth transition rod group, and the two fourth transition rod groups are symmetrically arranged on both sides of the fourth equally divided truss in the vertical direction; one end of the fourth transition rod group is connected to the two ends of the fourth equally divided truss in the horizontal direction, and the other end is connected to the support.

[0019] An isosceles triangle structure is formed between the fourth transition rod group and the fourth equally divided truss.

[0020] Furthermore, every four adjacent lattice structure units share one pillar.

[0021] Furthermore, the first equally divided truss and the second equally divided truss are symmetrical about the XoZ plane; the first equally divided truss and the fourth equally divided truss are symmetrical about the YoZ plane; the first equally divided truss and the third equally divided truss are symmetrical about the Z axis center; the fourth equally divided truss and the first equally divided truss are symmetrical about the YoZ plane; the second equally divided truss and the fourth equally divided truss are symmetrical about the Z axis center; the second equally divided truss and the third equally divided truss are symmetrical about the YoZ plane.

[0022] Furthermore, the pillars and the cubic trusses are both made of 316L stainless steel.

[0023] Compared with the prior art, the beneficial effect of this embodiment is that it effectively solves the problem of decreased energy absorption capacity of the tensile-dominant structure due to the unstable stress-strain response in the nonlinear stage. Through the unique structural design, the structure's anti-yield ability in the initial loading stage is enhanced, enabling the structure to withstand external loads more stably.

[0024] The hybrid lattice metamaterial structure of this embodiment improves the energy dissipation mechanism compared to traditional lattice structures (bcc, fcc), avoids uneven energy dissipation caused by stress fluctuations or strain localization, and achieves more efficient and uniform energy absorption.

[0025] Under axial compression conditions, the structure described in this embodiment significantly improves the flow stress level, enhances the anti-deformation ability in the plastic deformation stage, and maintains structural stability and load-bearing capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present invention. The same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0027] Figure 1 A schematic diagram of the hybrid lattice metamaterial structure provided in this embodiment;

[0028] Figure 2 A schematic diagram of a quarter lattice structure unit cell of the hybrid lattice metamaterial structure provided in this embodiment;

[0029] Figure 3 This is a schematic structural diagram of a lattice metamaterial unit of the hybrid lattice metamaterial structure provided in this embodiment.

[0030] In the figure: 100, lattice structure unit cell; 110, cube truss; 111, first equally divided truss; 112, second equally divided truss; 113, third equally divided truss; 114, fourth equally divided truss; 120, transition rod; 121, first transition rod; 122, second transition rod; 123, third transition rod; 124, fourth transition rod; 130, pillar; 200, lattice metamaterial unit. DETAILED DESCRIPTION

[0031] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that, unless there is a conflict, the embodiments and features in the embodiments of this embodiment can be combined with each other. The present embodiment will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0032] See Figure 1-3 As shown, in some embodiments of the present application, this embodiment provides a hybrid lattice metamaterial structure, including:

[0033] The lattice structure unit cell 100 has a plurality of lattice structure unit cells 100, which are arranged in sequence along the X, Y, and Z directions to form a lattice metamaterial unit 200; wherein, the lattice structure unit cell 100 includes a cube truss 110, a transition rod 120 and a pillar 130, and the two ends of the transition rod 120 are respectively connected to the cube truss 110 and the pillar 130.

[0034] Specifically, the cube truss 110 includes:

[0035] The first equally divided truss 111, the second equally divided truss 112, the third equally divided truss 113 and the fourth equally divided truss 114 are connected end to end in a clockwise or counterclockwise direction to form a closed cubic frame.

[0036] As can be appreciated, the design of this cubic truss 110 not only enhances the overall stability of the structure but also improves its load-bearing capacity in various directions. The connection between the first and fourth equally divided trusses 111, 114 ensures that the structure can more effectively distribute and resist stress when subjected to external forces, thereby improving its durability and safety. Furthermore, this design makes the structure more flexible and convenient during manufacturing and assembly, reducing production costs and improving production efficiency.

[0037] Specifically, the transition rod 120 includes a first transition rod 121 , a second transition rod 122 , a third transition rod 123 and a fourth transition rod 124 .

[0038] Specifically, there are four first transition rods 121, and every two first transition rods 121 constitute a first transition rod 121 group. The two first transition rod 121 groups are symmetrically arranged on both sides of the first equally divided truss 111 in the vertical direction. One end of the first transition rod 121 group is connected to the two ends of the first equally divided truss 111 in the horizontal direction, and the other end is connected to the support 130.

[0039] An isosceles triangle structure is formed between the first transition rod 121 group and the first equally divided truss 111 .

[0040] As can be appreciated, this isosceles triangle design further enhances the structural stability and load-bearing capacity. Within the isosceles triangle structure, the connection points between the first transition bar 121 and the first equally divided truss 111 form a stable triangular support. This allows the structure to better disperse and resist stress when subjected to external forces, avoiding stress concentration and localized damage. Furthermore, the isosceles triangle design also allows for greater precision and reliability during manufacturing and assembly, improving the overall quality and performance of the structure.

[0041] Specifically, there are four second transition rods 122, and every two second transition rods 122 constitute a second transition rod 122 group. The two second transition rod 122 groups are symmetrically arranged on both sides of the second equally divided truss 112 in the vertical direction. One end of the second transition rod 122 group is connected to the two ends of the second equally divided truss 112 in the horizontal direction, and the other end is connected to the support 130.

[0042] An isosceles triangle structure is formed between the second transition rod 122 group and the second equally divided truss 112 .

[0043] It is understood that this isosceles triangle design between the second transition bars 122 and the second equally divided trusses 112 also enhances structural stability and load-bearing capacity. Similar to the first transition bar 121 set, the isosceles triangle structure formed between the second transition bar 122 set and the second equally divided trusses 112 provides additional support and stability, enabling the structure to maintain its integrity and load-bearing capacity even under complex external forces. Furthermore, this design improves the structure's fatigue resistance and extends its service life.

[0044] Specifically, there are four third transition rods 123, and every two third transition rods 123 constitute a third transition rod 123 group. The two third transition rod 123 groups are symmetrically arranged on both sides of the third equally divided truss 113 in the vertical direction. One end of the third transition rod 123 group is connected to the two ends of the third equally divided truss 113 in the horizontal direction, and the other end is connected to the support 130.

[0045] An isosceles triangle structure is formed between the third transition rod 123 group and the third equally divided truss 113 .

[0046] Specifically, there are four fourth transition rods 124, and every two fourth transition rods 124 constitute a fourth transition rod group 124. The two fourth transition rod groups 124 are symmetrically arranged on both sides of the fourth equally divided truss 114 in the vertical direction. One end of the fourth transition rod group 124 is connected to the two ends of the fourth equally divided truss 114 in the horizontal direction, and the other end is connected to the support 130.

[0047] An isosceles triangle structure is formed between the fourth transition rod 124 group and the fourth equally divided truss 114 .

[0048] It is understandable that the design of this isosceles triangle structure also plays a vital role between the third transition rod 123 and the third equally divided truss 113, and between the fourth transition rod 124 and the fourth equally divided truss 114. It not only enhances the overall rigidity and stability of the structure, but also significantly improves the load-bearing capacity of the structure in multiple directions. Under the support of the isosceles triangle structure, a stable triangular support system is formed between the third transition rod 123 group and the fourth transition rod 124 group and the corresponding equally divided trusses. This design enables the structure to more effectively disperse and resist stress when facing complex external forces, thereby avoiding the risk of stress concentration and local damage. In addition, the application of the isosceles triangle structure further enhances the structure's anti-deformation ability and durability, providing a strong guarantee for the stability and reliability of the hybrid lattice metamaterial structure in practical applications.

[0049] Specifically, every four adjacent lattice structure units 100 share one pillar 130 .

[0050] Specifically, the first equally divided truss 111 and the second equally divided truss 112 are symmetrical about the XoZ plane; the first equally divided truss 111 and the fourth equally divided truss 114 are symmetrical about the YoZ plane; the first equally divided truss 111 and the third equally divided truss 113 are symmetrical about the center of the Z axis; the fourth equally divided truss 114 and the first equally divided truss 111 are symmetrical about the YoZ plane; the second equally divided truss 112 and the fourth equally divided truss 114 are symmetrical about the center of the Z axis; the second equally divided truss 112 and the third equally divided truss 113 are symmetrical about the YoZ plane.

[0051] It is understandable that this symmetrical design not only makes the structure more aesthetically pleasing and coordinated, but more importantly, it further enhances its stability and load-bearing capacity. With the symmetrical layout of equally divided trusses, the structure can better disperse stress to various parts when subjected to external forces, thereby avoiding the risk of stress concentration and localized damage. Furthermore, this symmetrical design improves the structure's torsional resistance, allowing it to maintain its integrity and stability when faced with complex external forces. This design feature provides strong support for the wide applicability of hybrid lattice metamaterial structures in practical applications.

[0052] Specifically, the support column 130 and the cube truss 110 are both made of 316L stainless steel.

[0053] It is understandable that 316L stainless steel, with its excellent corrosion resistance, high temperature resistance, and high strength, ensures the stability and durability of the hybrid lattice metamaterial structure in harsh environments. This material selection not only improves the overall performance of the structure but also opens up possibilities for its application in aerospace, automotive manufacturing, construction, and other fields. Through careful material selection and structural design, this embodiment successfully achieves significant improvements in the load-bearing efficiency, energy dissipation, and stability of the hybrid lattice metamaterial structure, opening up new avenues for the development and application of new metamaterials.

[0054] It should also be noted that the truss struts 130 of each equally divided truss (the first equally divided truss 111, the second equally divided truss 112, the third equally divided truss 113, and the fourth equally divided truss 114) are cylindrical, rectangular, or other three-dimensional structures. Similarly, each internal strut 130 is also cylindrical, rectangular, or other three-dimensional structure. Furthermore, all internal struts 130 and all truss struts 130 have the same radius.

[0055] As can be understood, this design allows for more uniformity and standardization in the manufacturing and processing of the hybrid lattice metamaterial structure, improving production efficiency and product quality. Furthermore, the uniform structure of struts 130 helps maintain the overall consistency and stability of the structure, enabling it to more evenly distribute and resist stress when subjected to external forces, thereby improving the structure's overall load-bearing capacity and durability. Furthermore, this design facilitates maintenance and repair of the structure, reducing maintenance costs and time.

[0056] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may take the form of a complete hardware embodiment, a complete software embodiment, or a combination of software and hardware embodiments. Furthermore, the present application may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0057] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems) and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0058] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0059] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this embodiment rather than to limit it. Although this embodiment has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of this embodiment can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of this embodiment should be included in the scope of protection of the claims of this embodiment.

Claims

1. A hybrid lattice metamaterial structure, characterized in that: include: The lattice structure unit cell has a plurality of lattice structure unit cells, and the plurality of lattice structure unit cells are arranged in sequence along the X, Y, and Z directions to form a lattice metamaterial unit; wherein the lattice structure unit cell includes a cube truss, a transition rod and a pillar, and the two ends of the transition rod are respectively connected to the cube truss and the pillar.

2. The hybrid lattice metamaterial structure according to claim 1, characterized in that: The cube truss comprises: The first equally divided truss, the second equally divided truss, the third equally divided truss and the fourth equally divided truss are connected end to end in a clockwise or counterclockwise direction to form a closed cubic frame.

3. The hybrid lattice metamaterial structure according to claim 2, characterized in that: The transition rod includes a first transition rod, a second transition rod, a third transition rod and a fourth transition rod.

4. The hybrid lattice metamaterial structure according to claim 3, characterized in that: There are four first transition rods, and every two of the first transition rods constitute a first transition rod group. The two first transition rod groups are symmetrically arranged on both sides of the first equally divided truss in the vertical direction; one end of the first transition rod group is connected to the two ends of the first equally divided truss in the horizontal direction, and the other end is connected to the support. An isosceles triangle structure is formed between the first transition rod group and the first equally divided truss.

5. The hybrid lattice metamaterial structure according to claim 4, characterized in that: There are four second transition rods, and every two second transition rods constitute a second transition rod group. The two second transition rod groups are symmetrically arranged on both sides of the second equally divided truss in the vertical direction; one end of the second transition rod group is connected to the two ends of the second equally divided truss in the horizontal direction, and the other end is connected to the support. An isosceles triangle structure is formed between the second transition rod group and the second equally divided truss.

6. The hybrid lattice metamaterial structure according to claim 5, characterized in that: There are four third transition rods, and every two third transition rods constitute a third transition rod group. The two third transition rod groups are symmetrically arranged on both sides of the third equally divided truss in the vertical direction; one end of the third transition rod group is connected to the two ends of the third equally divided truss in the horizontal direction, and the other end is connected to the support. An isosceles triangle structure is formed between the third transition rod group and the third equally divided truss.

7. The hybrid lattice metamaterial structure according to claim 6, characterized in that: There are four fourth transition rods, and every two of the fourth transition rods constitute a fourth transition rod group. The two fourth transition rod groups are symmetrically arranged on both sides of the fourth equally divided truss in the vertical direction; one end of the fourth transition rod group is connected to the two ends of the fourth equally divided truss in the horizontal direction, and the other end is connected to the support. An isosceles triangle structure is formed between the fourth transition rod group and the fourth equally divided truss.

8. The hybrid lattice metamaterial structure according to claim 7, characterized in that: Every four adjacent lattice structure units share one pillar.

9. The hybrid lattice metamaterial structure according to claim 8, characterized in that: The first equally divided truss and the second equally divided truss are symmetrical about the XoZ plane; the first equally divided truss and the fourth equally divided truss are symmetrical about the YoZ plane; the first equally divided truss and the third equally divided truss are symmetrical about the Z axis center; the fourth equally divided truss and the first equally divided truss are symmetrical about the YoZ plane; the second equally divided truss and the fourth equally divided truss are symmetrical about the Z axis center; the second equally divided truss and the third equally divided truss are symmetrical about the YoZ plane.

10. The hybrid lattice metamaterial structure according to claim 9, characterized in that: The pillars and the cube trusses are both made of 316L stainless steel.

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