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Nonlinear constitutive relation analysis method, system and device for negative poisson ratio structure

A constitutive relation and negative Poisson's ratio technology, applied in the field of materials science, can solve the problems of increasing model calculation difficulty, time-consuming and labor-intensive experimental design and analysis of geometric form and mechanical properties of honeycomb structures, and reduced computational efficiency, and achieves the production and manufacturing process. Convenience, good calculation accuracy and scope of application, and the effect of shortening the design cycle

Pending Publication Date: 2020-05-22
GUANGZHOU UNIVERSITY
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  • Application Information

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Problems solved by technology

[0006] Most of the above studies are based on experiments or numerical simulations. The concave honeycomb structure is generally regarded as an anisotropic material with periodic characteristics. In engineering design and analysis, complex geometric forms and anisotropic mechanical properties make the honeycomb structure Experimental design and analysis are time consuming and uneconomical
With the development of computing science, it has become a reality to use general-purpose finite element programs for structural modeling and mechanical simulation of large and complex structures. However, refined models will greatly increase the difficulty of model calculations and significantly reduce computational efficiency.
At the same time, the complex and diverse structures and boundary conditions also make the application of the model have certain limitations.

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Embodiment Construction

[0057] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention. For the step numbers in the following embodiments, it is only set for the convenience of illustration and description, and the order between the steps is not limited in any way. The execution order of each step in the embodiments can be adapted according to the understanding of those skilled in the art sexual adjustment.

[0058] The analysis method, system and device of the nonlinear constitutive relation of the negative Poisson's ratio structure proposed according to the embodiment of the present invention will be described in detail bel...

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Abstract

The invention discloses a nonlinear constitutive relation analysis method, a system and a device for a negative poisson ratio structure. The method comprises the following steps: acquiring a unit cellwith a concave honeycomb structure; carrying out deformation analysis on the unit cell; obtaining a correction factor according to a deformation analysis result; establishing a nonlinear constitutiverelation of the concave honeycomb structure according to the correction factor; and designing and producing a corresponding structure according to the nonlinear constitutive relation. By using the method provided by the invention, the design, production and manufacturing processes are more convenient in a scene with special requirements on materials or structures, the design period of the productis further shortened, and the method provided by the invention has better calculation precision and application range compared with a numerical method and a test method in the prior art. The method can be widely applied to the technical field of material science.

Description

technical field [0001] The invention relates to the technical field of material science, in particular to an analysis method, system and device for the nonlinear constitutive relation of a negative Poisson's ratio structure. Background technique [0002] Negative Poisson's ratio: It means that when stretched, the material expands laterally within the elastic range; when compressed, the material shrinks laterally. [0003] Cell: The smallest structural unit in a multicellular structure, such as in a honeycomb structure, a unit surrounded by each small hole is called a cell. [0004] Bending moment: A type of internal moment on the section of a stressed member. [0005] The honeycomb structure is a good lightweight structure due to its characteristics of high specific strength, high specific stiffness, good heat and sound insulation performance, and strong energy absorption. The microstructure of the honeycomb is different, and the macroscopic mechanical and physical propert...

Claims

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Application Information

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IPC IPC(8): G06F30/20G06F119/14
CPCG06F2119/14G06F30/20Y02T90/00
Inventor 蓝林华黄泽彬汪大洋孙静张永山
Owner GUANGZHOU UNIVERSITY
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