Micromechanical analysis of interfacial debonding in unidirectional fiber-reinforced composites

被引:80
作者
Caporale, A. [1 ]
Luciano, R. [1 ]
Sacco, E. [1 ]
机构
[1] Univ Cassino, Dipartimento Meccan Strutture Ambiente & Terr, I-03043 Cassino, Italy
关键词
fiber-reinforced composites; homogenization; damage; interfacial partial debonding; brittle behaviour; finite elements;
D O I
10.1016/j.compstruc.2006.08.023
中图分类号
TP39 [计算机的应用];
学科分类号
081203 ; 0835 ;
摘要
In this paper the behaviour of unidirectional fiber-reinforced composites with imperfect interfacial bonding is investigated by using the finite element method. The matrix and the fibers are considered homogeneous, isotropic and linearly elastic; an interfacial failure model is implemented by connecting the fibers and the matrix at the finite element nodes by normal and tangential brittle-elastic springs. Numerical analyses are carried out on a unit cell extracted from a composite model characterized by a periodic microstructure. The micromechanical simulations provide the first failure loci (FFL), i.e. the envelopes of the composite average strains corresponding to the initiation of the debonding, and the instantaneous overall moduli of the damaged composite corresponding to several interface damage configurations. The results show that the intersections of the FFL with prescribed planes are defined by curves associated with different interface failure modes. Besides, damage induced by fiber-matrix debonding is strongly anisotropic and dependent on the load history. (c) 2006 Elsevier Ltd. All rights reserved.
引用
收藏
页码:2200 / 2211
页数:12
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