Reinforced lattice structure and reinforced lattice model
By installing arc-shaped support rods in the body-centered cubic structure and nesting the face-centered cubic structure into the body-centered cubic structure, the problems of insufficient impact resistance and load-bearing capacity of the existing dot matrix structure are solved, and the lightweight design requirements of the structure are achieved.
Patent Information
- Application Number
- CN202421657081.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-12
- Publication Date
- 2025-04-15
- Estimated Expiration
- 2034-07-12
AI Technical Summary
The existing dot matrix structures have shortcomings in impact resistance and load bearing capacity, and it is difficult to meet the complex structure requirements of lightweight design at the same time.
By installing the support rod of the arc-shaped structure in the body-centered cubic structure, the bending moment is converted into axial pressure, the stiffness and compressive resistance of the structure are improved, and the face-centered cubic structure is wrapped or nested with the body-centered cubic structure, enhancing the overall impact resistance and load bearing capacity.
It has achieved the improvement of the impact resistance and load-bearing capacity of the lattice structure, has good energy absorption characteristics and mechanical properties, and is suitable for lightweight design parts.
Smart Images
Figure CN222760194U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of lattice structures, and in particular relates to a reinforced lattice structure and a reinforced lattice model. Background Art
[0002] Lightweighting is an important goal that has always been pursued in the fields of aerospace, weapons and equipment, and transportation. Weight reduction will bring about significant improvements in performance. Compared with material lightweighting, structural lightweight design can better meet the special requirements for structures under complex conditions in actual engineering and is widely used in actual engineering. Truss-type lattice structures are divided into bending-dominant and stretch-dominant types. Bending-dominant behavior or stretching-dominant behavior has a great influence on the compression behavior of additively manufactured structures. Tensile-dominant structures are more durable, while compression struts are damaged first and are brittle. Bending-dominant structures deform more consistently, absorb more energy, and struts bend or twist under compression and are ductile.
[0003] like Figure 1 The lattice unit shown has a body-centered cubic structure (BCC) with strong energy absorption capacity, which is suitable for designing impact-resistant structures, but has poor mechanical strength; the face-centered cubic structure (FCC) has good stiffness and strength performance, which is suitable for designing load-bearing structures, but has poor impact resistance. Utility Model Content
[0004] In view of this, the reinforced lattice structure provided by the present invention has both good impact resistance and good load-bearing capacity, improves the overall performance, and is better suitable for lightweight design.
[0005] On the one hand, a reinforced lattice structure is provided, including a body-centered cubic structure and a face-centered cubic structure, wherein the body-centered cubic structure includes a first vertical rod, the face-centered cubic structure includes a plurality of vertices, a plurality of support rods arranged in an arc structure are installed on the first vertical rod, one end of all the support rods is a free end, and the other end is installed on a horizontal plane at a preset height of the first vertical rod, wherein when the body-centered cubic structure is subjected to a vertical load, the bending moment generated is converted into an axial pressure through the support rods, thereby improving the stiffness and compressive resistance of the body-centered cubic structure;
[0006] The face-centered cubic structure wraps or nests the body-centered cubic structure, and the free end of each support rod corresponds to one of the vertices and is connected.
[0007] Preferably or optionally, the height of the first vertical rod is the same as the height of the face-centered cubic structure.
[0008] Preferably or optionally, the support rod comprises a first connecting rod and a second connecting rod, and the first connecting rod and the second connecting rod are both arranged in an arc structure, wherein:
[0009] A plurality of the first connecting rods are symmetrically arranged with the first vertical rod as the center, one end of which is a free end, and the other end intersects with the outer circumferential surface of the first vertical rod at a preset height;
[0010] The second connecting rod is arranged in a mirror image with the corresponding first connecting rod with the outer circumferential surface as the center.
[0011] Preferably or optionally, the centers of the first connecting rod and the second connecting rod are both facing the first vertical rod.
[0012] Preferably or optionally, the number of the first connecting rod and the number of the second connecting rod are both 4.
[0013] Preferably or optionally, it further comprises a plurality of second vertical rods parallel to the first vertical rod, wherein:
[0014] The second vertical rod is arranged outside the face-centered cubic structure, and both ends are respectively connected to the inner corners of the two adjacent vertex angles in the vertical direction, which can improve the load-bearing strength of the face-centered cubic structure.
[0015] Preferably or optionally, the number of vertex corners of the face-centered cubic structure is 8.
[0016] Preferably or optionally, the material of the body-centered cubic structure and / or the face-centered cubic structure is high-temperature alloy GH4169.
[0017] On the other hand, a reinforced lattice model is provided, comprising a plurality of reinforced lattice structures as described in part or in whole above.
[0018] Beneficial Effects
[0019] The first vertical rod is equipped with a plurality of supporting rods arranged in an arc structure. When the arc structure is subjected to vertical load, the bending moment generated is converted into axial pressure through the supporting rods, which can improve the compressive strength of the structure and has good energy absorption characteristics. The first vertical rod and the face-centered cubic structure bear the forces at the upper and lower ends, so that the structure has good bearing capacity, and the structure is simple, no additional supporting parts are required, and the preparation is convenient. It has good mechanical properties, and the preparation materials and various dimensions of the structure can be selected according to the needs, which is suitable as a lightweight filling material for parts under high strength and high damping. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0021] Figure 1 Schematic diagram of BCC and FCC structures included in the traditional lattice unit cell;
[0022] Figure 2 It is a schematic diagram of the improved body-centered cubic structure of the utility model;
[0023] Figure 3 It is a schematic diagram of the improved face-centered cubic structure of the utility model;
[0024] Figure 4 Schematic diagram of a face-centered cubic structure nested within a body-centered cubic structure;
[0025] Figure 5 A schematic diagram of the mirror image arrangement of the first link and the second link;
[0026] Figure 6 is a schematic diagram of the enhanced lattice model, where
[0027] 1. First vertical rod; 2. Second vertical rod; 31. First connecting rod; 32. Second connecting rod; 4. Diagonal rod. DETAILED DESCRIPTION
[0028] The embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.
[0029] The following describes the embodiments of the present disclosure through specific examples, and those skilled in the art can easily understand other advantages and effects of the present disclosure from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all of the embodiments. The present disclosure can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present disclosure. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present disclosure.
[0030] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on the present disclosure, it should be understood by those skilled in the art that an aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number of aspects described herein can be used to implement the device and / or practice the method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this device and / or practice this method.
[0031] It should also be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present disclosure. The drawings only show components related to the present disclosure rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.
[0032] Additionally, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, one skilled in the art will appreciate that aspects may be practiced without these specific details.
[0033] like Figures 2 to 5 The reinforced lattice structure shown includes a body-centered cubic structure and a face-centered cubic structure. The body-centered cubic structure includes a first vertical rod 1, and the face-centered cubic structure includes a plurality of vertices. Figure 1 As shown, the traditional reinforced lattice unit cell is a body-centered cubic structure (BCC) or a face-centered cubic structure (FCC), and the angle of the oblique rod 4 of the face-centered cubic structure (FCC) is 40°-50°. Generally speaking, the body-centered cubic structure (BCC) is a bending-dominated structure, which is characterized by strong energy absorption capacity and is suitable for designing impact-resistant structures, but has low bending resistance. The face-centered cubic structure (FCC) is a tensile-dominated structure with good bending resistance, stiffness and strength performance, and is suitable for designing load-bearing structures, but has poor impact resistance. In order to comprehensively improve the overall bending and impact resistance, the existing reinforced lattice unit cells are improved respectively and the two are combined for use, specifically:
[0034] The first vertical rod 1 is provided with a plurality of supporting rods arranged in an arc structure, one end of each supporting rod is a free end, and the other end is installed on a horizontal plane at a preset height of the first vertical rod 1, such as an outer peripheral surface or a horizontal plane at the preset height, or partially embedded in the first vertical rod 1. The preset height is generally half the height position, and can also be adjusted according to design requirements, wherein,
[0035] When the body-centered cubic structure is subjected to vertical load, the bending moment generated is converted into axial pressure through the support rods, which can improve the stiffness and compressive resistance of the body-centered cubic structure;
[0036] The face-centered cubic structure wraps or nests the body-centered cubic structure, and the free end of each support rod corresponds to a vertex and is connected.
[0037] As a specific implementation method provided in this case, the reinforced lattice structure serves as a small unit of the reinforced lattice model. Considering the processing of the overall structure, the height of the first vertical rod 1 is the same as that of the face-centered cubic structure, which is convenient for manufacturing using additive technology.
[0038] As a specific implementation method provided in this case, in order to improve the multi-directional bending resistance of the body-centered cubic structure (BCC), the support rod includes a first connecting rod 31 and a second connecting rod 32, and the first connecting rod 31 and the second connecting rod 32 are both arranged in an arc structure. Multiple first connecting rods 31 are symmetrically arranged with the first vertical rod 1 as the center, such as a petal-shaped structure, one end is a free end, and the other end intersects on the outer circumferential surface where the first vertical rod 1 is at a preset height. The second connecting rod 32 is mirror-set with the corresponding first connecting rod 31 with the outer circumferential surface as the center, and is also a mirror-symmetrical petal structure. By respectively arranging the first connecting rod 31 and the second connecting rod 32 in two directions, the improvement of the multi-directional bending resistance is achieved.
[0039] Furthermore, the centers of the first connecting rod 31 and the second connecting rod 32 are both oriented toward the first vertical rod 1 , and the number of the first connecting rod 31 and the second connecting rod 32 are both four, and the angle between the first connecting rod 31 and the first vertical rod 1 is 35°-60°.
[0040] In some or all of the above-mentioned technical solutions, the impact resistance of the face-centered cubic structure (FCC) is further improved, and it also includes a plurality of second vertical rods 2 parallel to the first vertical rod 1, wherein the second vertical rods 2 are arranged on the outside of the face-centered cubic structure, and the two ends are respectively connected to the inner angles of two adjacent vertex angles in the vertical direction, which can improve the strength of the face-centered cubic structure to withstand loads.
[0041] With this arrangement, the arched structure in the lattice unit cell can convert the generated bending moment into axial pressure under the vertical load, and has good energy absorption characteristics. Combined with the enhanced face-centered cubic structure,
[0042] By setting the second vertical rod 2, the forces acting on the upper and lower ends of the face-centered cubic structure can be better borne, and the structure has a good bearing capacity.
[0043] As a specific implementation provided in this case, the number of vertex angles of the face-centered cubic structure is 8, corresponding to the sum of the number of the first connecting rod 31 and the second connecting rod 32. Preferably, the body-centered cubic structure and / or the face-centered cubic structure is made of high-temperature alloy GH4169, and the enhanced lattice structure has good mechanical properties. The preparation material and various dimensions of the structure can be selected according to needs, and it is suitable as a lightweight filling material for parts under high strength and high damping.
[0044] In general, the internal (body-centered cubic structure) arched connecting rod structure and the external (face-centered cubic structure) second vertical rod 2 enable the whole to better bear the load in the vertical direction, and the internal arched structural unit bends and deforms under stress and then recovers to achieve the effect of energy absorption, so that the lattice structure has good load-bearing capacity and energy absorption capacity while reducing shock.
[0045] On the other hand, an enhanced lattice model is provided, such as Figure 6 As shown, it includes multiple parts or all of the reinforced lattice structures.
[0046] Furthermore, the reinforced lattice structure is processed into a three-dimensional array geometry using additive integrated manufacturing technology, such as a tetrahedral structure or other cubic structure. Generally, the number of layers is at least three.
[0047] The connection method of the tetrahedral structure is, for example, one end of the first vertical rod of the body-centered cubic structure of the middle layer is connected to the bottom end of the first vertical rod of the body-centered cubic structure of the adjacent upper layer, and the other end is connected to the top end of the first vertical rod of the body-centered cubic structure of the adjacent lower layer;
[0048] The top corner of the face-centered cubic structure of the middle layer is connected to the top corner of the face-centered cubic structure of the adjacent upper layer in a surface contact manner, and the top corner of the face-centered cubic structure of the middle layer is connected to the top corner of the face-centered cubic structure of the adjacent lower layer in a surface contact manner;
[0049] The face-centered cubic structure in the middle of the same horizontal plane is connected with the adjacent face-centered cubic structures on all four sides by means of contact between the outer sides of the top corners.
[0050] Furthermore, a plane of a certain area is provided on the outer side surface of the top angle to facilitate the butt connection of the face-centered cubic structure between the upper and lower layers.
[0051] The above is only a specific implementation of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present disclosure should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.
Claims
1. A reinforced lattice structure, comprising a body-centered cubic structure and a face-centered cubic structure, wherein the body-centered cubic structure comprises a first vertical rod, and the face-centered cubic structure comprises a plurality of vertices, characterized in that: A plurality of support rods arranged in an arc structure are installed on the first vertical rod, one end of each of the support rods is a free end, and the other end is installed on a horizontal plane at a preset height of the first vertical rod, wherein when the body-centered cubic structure is subjected to a vertical load, the bending moment generated is converted into axial pressure through the support rods, thereby improving the stiffness and compressive resistance of the body-centered cubic structure; The face-centered cubic structure wraps or nests the body-centered cubic structure, and the free end of each support rod corresponds to one of the vertices and is connected.
2. The reinforced lattice structure according to claim 1, characterized in that: The height of the first vertical rod is the same as the height of the face-centered cubic structure.
3. The reinforced lattice structure according to claim 1, characterized in that: The support rod comprises a first connecting rod and a second connecting rod, and the first connecting rod and the second connecting rod are both arranged in an arc structure, wherein: A plurality of the first connecting rods are symmetrically arranged with the first vertical rod as the center, one end of which is a free end, and the other end intersects with the outer circumferential surface of the first vertical rod at a preset height; The second connecting rod is arranged in a mirror image with the corresponding first connecting rod with the outer circumferential surface as the center.
4. The reinforced lattice structure according to claim 3, characterized in that: The centers of the first connecting rod and the second connecting rod are both oriented toward the first vertical rod.
5. The reinforced lattice structure according to claim 3, characterized in that: The number of the first connecting rods and the number of the second connecting rods are both four.
6. The reinforced lattice structure according to any one of claims 1 to 5, characterized in that: It also includes a plurality of second vertical rods parallel to the first vertical rod, wherein: The second vertical rod is arranged outside the face-centered cubic structure, and both ends are respectively connected to the inner corners of the two adjacent vertex angles in the vertical direction, which can improve the load-bearing strength of the face-centered cubic structure.
7. The reinforced lattice structure according to claim 6, characterized in that: The number of vertex corners of the face-centered cubic structure is 8.
8. The reinforced lattice structure according to claim 1, characterized in that: The material of the body-centered cubic structure and / or face-centered cubic structure is the high-temperature alloy GH4169.
9. An enhanced lattice model, characterized in that: It comprises a plurality of reinforced lattice structures as claimed in any one of claims 1 to 8.
10. The enhanced lattice model according to claim 9, characterized in that: The plurality of reinforced lattice structures are processed into a three-dimensional array geometry by using an additive integrated manufacturing technology.