孔隙率对复合材料单向板横向力学性能的影响

玻璃钢/复合材料 ›› 2017, Vol. 0 ›› Issue (6): 33-38.

孔隙率对复合材料单向板横向力学性能的影响

李波,万小朋^*,赵美英

西北工业大学航空学院,西安710072

收稿日期:2017-01-10 出版日期:2017-06-28 发布日期:2017-06-28
通讯作者: 万小朋(1962-),男,教授,博士生导师,主要从事飞行器设计、复合材料方面的研究,Wanxp@nwpu.edu.cn。
作者简介:李波(1985-),男,博士研究生,主要从事飞行器设计、复合材料方面的研究,libo050009@163.com。

THE INFLUENCE OF VOID CONTENTS ON TRANSVERSE MECHANICAL PROPERTIES OF UNIDIRECTIONAL COMPOSITES

LI Bo, WAN Xiao-peng^*, ZHAO Mei-ying

School of Aeronautics, Northwestern Polytechnical University, Xi’an 710072, China

Received:2017-01-10 Online:2017-06-28 Published:2017-06-28

摘要/Abstract

摘要： 在考虑纤维和孔隙随机分布的情况下,通过随机算法生成包含孔隙的代表性体积单元Representative Volume Element(RVE)。对生成的RVE建立有限元模型,引入基体的塑性本构模型和界面的双线性本构模型,采用有限元方法研究了孔隙率对碳纤维/环氧树脂复合材料单向板横向力学性能的影响。研究显示,孔隙随机分布对横向力学性能的影响不是很大;当孔隙率不超过临界值时,孔隙对横向力学性能的影响相对较小;当孔隙率超过临界值后,材料横向弹性模量、横向拉伸强度和横向压缩强度都会有较大的下降。

关键词: 孔隙率, 复合材料, 代表性体积单元, 横向力学性能

Abstract: Considering the random distribution of fibers and voids, the representative volume element (RVE) of the composites microstructure with random voids is generated by random algorithm. Then, by creating finite element model of RVEs and considering the elasticity-plasticity of matrix and bilinear traction-separation law for interface, the effect of void contents on transverse behavior of unidirectional composites is simulated by the finite element analysis. It is found that the effect of random distribution of voids is small on transverse properties. When void content is less than critical value, the influence of voids on transverse properties is weak relatively. When void content is more than critical value, the reduction in transverse modulus, transverse tension strength and transverse compression strength becomes signiticant.

Key words: void content, composites, RVE, transverse mechanical properties

中图分类号:

TB332

李波,万小朋,赵美英. 孔隙率对复合材料单向板横向力学性能的影响[J]. 玻璃钢/复合材料, 2017, 0(6): 33-38.

LI Bo, WAN Xiao-peng, ZHAO Mei-ying. THE INFLUENCE OF VOID CONTENTS ON TRANSVERSE MECHANICAL PROPERTIES OF UNIDIRECTIONAL COMPOSITES[J]. Fiber Reinforced Plastics/Composites, 2017, 0(6): 33-38.

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