A novel finite element method for predicting the tensile properties of 3D braided composites

被引：5
作者：
Yu, Guoqing [1 ]
Shi, Boqiang [1 ]
Shen, Yanhua [1 ]
Gu, Jie [2 ]
机构：
[1] Univ Sci & Technol Beijing, Sch Mech Engn, Beijing 100083, Peoples R China
[2] Beijing Inst Space Launch Technol, Beijing 100076, Peoples R China
来源：
MATERIALS RESEARCH EXPRESS | 2019年 / 6卷 / 12期
基金：
国家重点研发计划;
关键词：
3D braided composites; tensile properties; finite element analysis; multi-scale homogenization method; MULTIUNIT CELL MODEL; BOUNDARY-CONDITIONS; MECHANICAL-PROPERTIES; UNIT-CELLS; MICROSTRUCTURE; BEHAVIOR;
D O I：
10.1088/2053-1591/ab6492
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A novel unit-cell model which considers the structure interference of braiding yarns in the external region is proposed to describe the geometric structure of 3D braided composites. Based on the multi-scale homogenization theory, mesoscopic structure finite element analysis model is established to predict the stiffness matrix of unit-cells. Periodic boundary conditions are applied on the periodic surfaces of unit-cells to reflect the repeating feature. And the node deformation matching equations are applied on the internal connected faces of the surface unit-cell and the corner-cell, so that the displacement continuity conditions and traction continuity conditions are satisfied. In allusion to 3D braided composites with small braiding angle, principal tensile strength forecasting model is developed.
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页数：10
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