Numerical simulations of inter-laminar fracture in particle-toughened carbon fiber reinforced composites

被引：14
|
作者：
Xie, Yuesong [1 ]
Koslowski, Marisol [1 ]
机构：
[1] Purdue Univ, Sch Mech Engn, W Lafayette, IN 47907 USA
来源：
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING | 2017年 / 92卷
基金：
美国国家科学基金会;
关键词：
Damage mechanics; Micro-mechanics; Delamination;
D O I：
10.1016/j.compositesa.2016.10.019
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The most predominant failure mechanism in carbon fiber reinforced composites is delamination. Dispersed second phase particles have been added to the interlayer region to reduce this damaging effect. In this work a phase field damage model is used to study Mode I crack propagation in particle-toughened interlayers. The simulations show several damage mechanisms observed in experiments and the processes that produce crack growth. In particular, failure involves multiple micro-cracks forming ahead of the main crack tip that coalesce and lead to crack branching, deflection and the formation of ligaments. Additionally, increasing the particle stiffness and the surface energy of the matrix-particle interface do not lead to an improvement of the interlaminate toughness as the fiber-matrix interface becomes a preferential path for the crack through the nucleation of extended delamination zones ahead of the crack tip. (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码：62 / 69
页数：8
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