纺织复合材料细观力学分析的一般性周期性边界条件及其有限元实现

doi:10.7527/S1000-6893.2013.0281

Abstract

Abstract:

In order to resolve the conflict between the quick mesh generation of a unit-cell and the successful application of the periodic boundary conditions, a more general method is developed in the micromechanical finite element analysis of textile composites with an aperiodic mesh. The application of the general periodic boundary conditions is realized by enforcing multi-point constraints (MPC) on the corresponding nodes on paired faces, edges and corners of the unit-cell on the platform of ABAQUS software. The deformation, stress distribution and the predicted mechanical properties of 3D four-directional braided composites are compared between the unit-cell models with periodic and aperiodic mesh, thus verifying the validity and applicability of the proposed boundary conditions. The results show that the general periodic boundary conditions can achieve the free meshing of unit-cells with complicated microstructures, reduce the difficulty of meshing and improve the quality of mesh generation.

Key words: textile composite, micromechanics, unit-cell, periodic boundary condition, finite element method

CLC Number:

V258.3
TB332

ZHANG Chao, XU Xiwu, YAN Xue. General Periodic Boundary Conditions and Their Application to Micromechanical Finite Element Analysis of Textile Composites[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2013, 34(7): 1636-1645.

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General Periodic Boundary Conditions and Their Application to Micromechanical Finite Element Analysis of Textile Composites

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