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Ultralight high-rigidity mechanical metamaterial and optimization design method thereof

A high-stiffness, meta-material technology, applied in the field of meta-materials, can solve problems such as limited accuracy of local optimal solutions, high manufacturing difficulty, and difficulties, and achieve the effects of reducing part quality, reducing difficulty, and improving speed and accuracy

Pending Publication Date: 2022-05-10
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The existing ultra-light and high-stiffness metamaterials have the following disadvantages: (1) It is very difficult to manufacture, and it needs to be designed and manufactured as a whole, resulting in the need to consider the overall mechanical properties; It is very difficult to apply to macroscopic systems (such as bridges, automobiles and other actual objects); (3) the existing design schemes are derived from mathematical formulas for zero Poisson's ratio, elastic modulus, stress , the size of the strain, and then mathematically solve the parameters to find the local optimal value. It is difficult to calculate an accurate mathematical model for complex structures, and the accuracy of the local optimal solution is also very limited.

Method used

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  • Ultralight high-rigidity mechanical metamaterial and optimization design method thereof
  • Ultralight high-rigidity mechanical metamaterial and optimization design method thereof
  • Ultralight high-rigidity mechanical metamaterial and optimization design method thereof

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Embodiment Construction

[0032] Embodiments of the present invention will be described in detail below. It should be emphasized that the following description is only exemplary and not intended to limit the scope of the invention and its application.

[0033] It should be noted that when an element is referred to as being “fixed” or “disposed on” another element, it may be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0034] It is to be understood that the terms "length", "width", "top", "bottom", "front", "rear", "left", "right", "vertical", "horizontal", "top" , "bottom", "inner", "outer" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the embodiments of the present inve...

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Abstract

The invention discloses an ultralight high-rigidity mechanical metamaterial which comprises at least one structural unit capable of being spliced with each other, and each structural unit is of a cubic octahedral beam frame structure and is formed by splicing an internal structure and four external structures. The internal structure comprises a square plate, a cross beam and a straight beam connected with the center of the square plate and the center of the cross beam, the external structure is of a four-corner star-shaped flat plate structure, and one external structure is spliced between each corner of the square plate and each corresponding end of the cross beam. In other words, the upper outer end corner and the lower outer end corner of one external structure are spliced with one corner of the square plate and the corresponding end of the cross beam correspondingly, and the left outer end corner and the right outer end corner of every two adjacent external structures are spliced with each other; and the internal structure and the four external structures are spliced to form the cubic octahedral beam frame structure. The ultralight high-rigidity mechanical metamaterial disclosed by the invention has an ultralight characteristic and a relatively high axial elastic modulus.

Description

technical field [0001] The invention relates to the technical field of metamaterials, in particular to an ultra-light and high-rigidity mechanical metamaterial and an optimal design method thereof. Background technique [0002] Lightweight structures in bridge mechanical engineering are relatively common, and their advantages of light weight and high strength can improve the performance of the system. Mechanical metamaterials are designed to imitate lattice (lattice refers to a spatial structure arranged according to certain rules) structure, and use rods and beams to construct periodic or non-periodic arrangements into cell, grid, truss or lattice structures. In this way, geometric structure materials with different mechanical properties from selected natural materials can be prepared, and ultra-light and high-rigidity mechanical materials are representative of them. [0003] At present, additive manufacturing is mostly used to manufacture ultra-light and high-stiffness me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/23G06F30/15G06F30/13E01D19/00B62D29/00G06F119/14
CPCG06F30/23G06F30/13G06F30/15E01D19/00B62D29/00G06F2119/14
Inventor 梁斌王学谦孟得山柴晓萱马智浩
Owner SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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