Mechanical metamaterial compression bar stability analysis method

An analysis method and metamaterial technology, applied in the field of mechanical metamaterial compression bar stability analysis, can solve problems such as low work efficiency and long time, and achieve the effects of expanding the scope of application, shortening design time, and improving structural design efficiency

Active Publication Date: 2021-05-11
北京理工大学重庆创新中心 +1
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  • Abstract
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  • Application Information

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Problems solved by technology

However, the time required for these two methods is long and the work efficiency is low

Method used

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  • Mechanical metamaterial compression bar stability analysis method
  • Mechanical metamaterial compression bar stability analysis method
  • Mechanical metamaterial compression bar stability analysis method

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Embodiment Construction

[0042] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below through specific implementation methods in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0043] In one embodiment, such as figure 1 As shown, a mechanical metamaterial compression bar stability analysis method is provided, including the following steps:

[0044] In step S101, the sample periodic unit of the sample metamaterial strut is obtained, and a finite element analysis model is constructed according to the sample periodic unit.

[0045] Specifically, since the mechanical metamaterial strut structure is usually formed by the periodic arrangement of basic units, the basic units that make up the metamaterial strut can be regarded as periodic units. Therefor...

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Abstract

The invention provides a mechanical metamaterial compression bar stability analysis method which comprises the following steps of: obtaining a sample period unit of a sample metamaterial compression bar, and constructing a finite element analysis model according to the sample period unit; obtaining a target periodic unit of a target metamaterial compression bar, and performing finite element analysis on the target periodic unit according to the finite element analysis model to obtain a plurality of characteristic stiffness parameters; according to the deformation coordination condition of the target metamaterial compression bar, combining the plurality of characteristic stiffness parameters to obtain an overall stiffness matrix of the target metamaterial compression bar; establishing a buckling control equation, substituting a set pressure bar boundary condition and the overall stiffness matrix into the buckling control equation, and solving to obtain a critical instability load; and comparing a design load with the critical instability load, and judging the stability of the target metamaterial compression bar. According to the method, the time required for judging the structural stability of the metamaterial pressing rod is shortened, and the structural design efficiency is greatly improved.

Description

technical field [0001] The invention relates to the technical field of structural performance analysis of metamaterials, in particular to a method for analyzing the stability of mechanical metamaterial pressure rods. Background technique [0002] Metamaterials refer to some composite materials that have artificially designed structures and exhibit extraordinary physical properties that natural materials do not have. They break through the limitations of some apparent natural laws and thus obtain extraordinary material functions. Metamaterials have broad application prospects, and include electronic engineering, condensed matter physics, microwaves, optoelectronics, classical optics, materials science, semiconductor science, and nanotechnology. The strut structure made of metamaterials can be used in manufacturing industries such as aircraft and automobile manufacturing and engineering machinery manufacturing. [0003] In the prior art, for the mechanical stability analysis ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/23G06F30/17G16C10/00G16C60/00G06F111/10G06F119/14
CPCG06F30/23G06F30/17G16C10/00G16C60/00G06F2119/14G06F2111/10Y02T90/00
Inventor 孙伟福林高建
Owner 北京理工大学重庆创新中心
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