基于细观力学的短纤维增强复合材料断裂性能数值研究

玻璃钢/复合材料 ›› 2017, Vol. 0 ›› Issue (9): 34-39.

基于细观力学的短纤维增强复合材料断裂性能数值研究

高剑虹,杨晓翔

泉州师范学院,泉州362000

收稿日期:2017-03-20 出版日期:2017-09-28 发布日期:2017-09-28
作者简介:高剑虹(1982- ),女,博士,讲师,主要从事聚合物基复合材料力学方面的研究。
基金资助:
福建省中青年教师教育科研项目(JA14269)

NUMERICAL STUDY ON THE FRACTURE PROPERTIES OF SHORT-FIBER REINFORCED COMPOSITES BASED ON MICRO-MECHANICS

GAO Jian-hong, YANG Xiao-xiang

Quanzhou Normal University, Quanzhou 362000, China

Received:2017-03-20 Online:2017-09-28 Published:2017-09-28

摘要/Abstract

摘要： 基于细观力学,采用虚拟裂纹扩展结合有限元法计算了短纤维增强复合材料纤维端部不同方向裂纹的应变能释放率,研究了网格尺寸对应变能释放率计算结果的影响,并分析应变能释放率随裂纹长度,纤维的长度、半径和含量的变化关系。研究表明:网格尺寸对应变能释放率的计算结果影响小;不同区域的裂纹,其应变能释放率受裂纹长度的影响不同;应变能释放率随裂纹扩展方向变化曲线呈对称特点,其中滑移型裂纹的扩展阻力较小;应变能释放率随着纤维长度、半径和含量的增大而增大。

关键词: 复合材料, 短纤维, 断裂, 数值模拟

Abstract: The strain energy release rates of cracks with different directions in short-fiber reinforced composites were calculated using vitual crack propogation method combined with finite element method. The influence of mesh size as well as the crack length, fiber length, fiber radius and fiber content on the calculation results were studied. It is shown that, the mesh size has little effect on the calculation results; the strain energy release rates of cracks in different regions of composites vary differently with the crack length; it presents a regular change pattern with the variation of crack direction and the minimum of propagation resistance happens in the sliding crack; and the strain energy release rates increases as the increasing of fiber length, fiber radius and fiber content.

Key words: composites, short fiber, fracture, numerical simulation

中图分类号:

TB332

高剑虹,杨晓翔. 基于细观力学的短纤维增强复合材料断裂性能数值研究[J]. 玻璃钢/复合材料, 2017, 0(9): 34-39.

GAO Jian-hong, YANG Xiao-xiang. NUMERICAL STUDY ON THE FRACTURE PROPERTIES OF SHORT-FIBER REINFORCED COMPOSITES BASED ON MICRO-MECHANICS[J]. Fiber Reinforced Plastics/Composites, 2017, 0(9): 34-39.

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