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Thermoelasticity homogenizing method for three-dimensional random heterogeneous material under finite deformation

A heterogeneous, three-dimensional technology, applied in the direction of instrumentation, computing, electrical digital data processing, etc.

Active Publication Date: 2015-11-18
XIDIAN UNIV
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Problems solved by technology

However, limited deformation cases with large temperature excursions have rarely been developed

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  • Thermoelasticity homogenizing method for three-dimensional random heterogeneous material under finite deformation
  • Thermoelasticity homogenizing method for three-dimensional random heterogeneous material under finite deformation
  • Thermoelasticity homogenizing method for three-dimensional random heterogeneous material under finite deformation

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Embodiment Construction

[0082] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0083] like figure 1 As shown, the present invention mainly has three main processes. First, a three-dimensional RVE (representational volume element) model of randomly distributed particles was constructed based on random sequence addition method (RSA) using FORTRAN language. At the same time, on the basis of the finite element method, the numerical solution of the macroscopically effective quantity of the material under linear boundary conditions was obtained through the Monte Carlo simulation method, a stochastic homogenization model was established to solve the macroscopically effective properties of the composite material, and the internal deformation of the RVE was drawn 3D distribution plot of gradient field, stress field, and heat flow field. The specific technical scheme is as follows:

[0084] 1. Construct a random RVE numerical...

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Abstract

The invention discloses a thermoelasticity homogenizing method for a three-dimensional random heterogeneous material under finite deformation. The method comprises the steps as follows: 1) establishing a composite material representative volume element three-dimensional RVE numerical model with randomly distributed particles based on random sequence adding RSA method and removing a particle overlapping phenomenon while the particle volume fraction is relative large; 2) performing finite element analysis calculation on the composite material three-dimensional RVE numerical model under a thermoelasticity environment to obtain an arithmetic solution of effective property of the RVE numerical model; 3) establishing a random homogenizing model to calculate macroscopic effective property of a composite material and using the macroscopic effective property of the composite material as an actual and effective property. The method of the invention provides a more reliable homogenizing result for the macroscopic effective property of the composite material, and provides sufficient basis for the optimization design of structure and the use of new advanced materials.

Description

technical field [0001] The invention relates to computational mechanics of composite materials, in particular to a thermoelastic homogenization method for three-dimensional random heterogeneous materials under finite deformation. Background technique [0002] The study and analysis of heterogeneous materials is a classic problem. Within the scope of continuum mechanics, there are two research methods: macroscopic mechanics and mesoscopic mechanics. The macromechanics method focuses on the performance of structures composed of composite materials (such as laminates), such as the calculation of stiffness, strength, and thermal stress; the mesomechanics method mainly studies the interaction of materials in various phases at the mesoscopic structural scale And to establish the relationship between the macroscopic properties of materials and the microscopic structural parameters. The macroscopic properties here are also called effective properties, which refer to the properties ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 马娟李亮杰陈永琴杨冀蒙
Owner XIDIAN UNIV
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