Modelling the competition between interface debonding and particle fracture using a plastic strain dependent cohesive zone

被引:41
作者
Charles, Y. [2 ]
Estevez, R. [1 ]
Brechet, Y. [3 ]
Maire, E. [1 ]
机构
[1] Univ Lyon, Insa Lyon, MATEIS CNRS, UMR 5510, F-69621 Villeurbanne, France
[2] Univ Paris 13, Inst Galilee, LPMTM, CNRS UPR 9001, F-93430 Villetaneuse, France
[3] INP Grenoble, CNRS, UMR 5266, SIMAP, F-38402 St Martin Dheres, France
关键词
Metal matrix composites; Cohesive zone; Damage; Fracture; CRACK-GROWTH; SIMULATIONS; TOMOGRAPHY; NUCLEATION; DECOHESION;
D O I
10.1016/j.engfracmech.2009.11.012
中图分类号
O3 [力学];
学科分类号
08 ; 0801 ;
摘要
In metal matrix composites made of elastic spherical reinforcements (zirconia and/or silica ceramics) embedded in an aluminium matrix two damage mechanisms are observed to trigger failure: particle fracture or decohesion at the particle-matrix interface. Experimentally, it was shown that the dominant damage mechanism is governed by the matrix plastic characteristics: a soft matrix composite shows interface debonding while particles breakdown occurs in the composite with a hard matrix. The physics underlying this dependence are related to plastic strain near the interface which can assist decohesion. We present a cohesive zone model for the particle-matrix interface that accounts for local plastic strain effects, based on the analysis of the influence of dislocation accumulation on the local stress level. Such a description is shown able to capture the experimental observations while being simple to implement in a finite element code, as performed here with Abaqus. (C) 2009 Elsevier Ltd. All rights reserved.
引用
收藏
页码:705 / 718
页数:14
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