Finite element simulation of shaped ductile fiber pullout using a mixed cohesive zone/friction interface model

被引：46
作者：
Tsai, JH [1 ]
Patra, A [1 ]
Wetherhold, R [1 ]
机构：
[1] SUNY Buffalo, Dept Mech & Aerosp Engn, Buffalo, NY 14260 USA
来源：
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING | 2005年 / 36卷 / 06期
关键词：
fibres; fibre/matrix bond; fracture toughness; finite element analysis (FEA);
D O I：
10.1016/j.compositesa.2004.10.025
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The fiber pullout test has long served as surrogate for estimating fracture toughness of fiber-matrix systems. In this paper, the quasi-static analysis of elastoplastic fiber pullout process is simulated by the finite element method based on an updated Lagrangian formulation. To approximate the non-linear behavior of the fiber-matrix interface, we propose a mixed 'cohesive' and 'Coulomb-friction' model. The use of such a model enables us to simulate the entire pullout process. A combination of von Mises yield criterion and associated flow rule is utilized as the constitutive model to describe the plasticity in the initially annealed copper-fiber. Through comparison with the experimental results from straight-fiber pullout, key parameters for describing the interface model are determined and the model is validated. The model is then applied to simulate the pullout of the 'nail-head' shaped fiber family. Simulation results are used to design an optimal shape of the head to maximize the pullout work. (c) 2004 Published by Elsevier Ltd.
引用
收藏
页码：827 / 838
页数：12
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