ANALYSIS OF STRESS CONCENTRATIONS IN UNIDIRECTIONAL COMPOSITES TAKING INTO ACCOUNT THE TENSILE LOAD IN THE MATRIX

作     者：Ling, L Zeng, QD 

作者机构：Guangdong Univ Technol Dept Mechatron Engn Guangzhou 510643 Peoples R China S China Univ Technol Dept Engn Mech Canton 510641 Peoples R China 

出 版 物：《Acta Mechanica Solida Sinica》 (固体力学学报（英文版）)

年 卷 期：1998年第11卷第4期

页      面：318-328页

核心收录：

学科分类：08[工学] 080104[工学-工程力学] 0815[工学-水利工程] 0801[工学-力学（可授工学、理学学位）] 

基　　金：the Guangdong Provincial Natural Science Foundation of China 

主　　题：unidirectional composites stress concentration matrix stiffness shear-lag analysis 

摘      要：A modified shear-lag model accounting for the effect of the tensile stiffness of the ma, trix is proposed for solving the stress redistribution due to the failure of fibers and matrix in unidirectionally fibre-reinforced composites. The advantages of this model are simple, reasonable and accurate by comparison with the other similar modified shear-lag models. It can be further extended to study the stress redistribution with interfacial damage between fibres and matrix This paper quantitatively dis cusses the influence of the tensile stiffness ratio of matrix to fibre and of the fibre volume fraction on the stress concentration in the fibres and ma trix adjacent to cut fibres and matrix, and suggests that the influence of the matrix stiffness on the stress concentration can be neglected when the matrix stiffness is low, such as polymer matrix composites, and the fibre volume fraction is high. For other cases such as ceramic and metal matrix composites, the tensile load of the matrix cannot be neglected in the shear-lag analysis.