An interface element for the simulation of delamination in unidirectional fiber-reinforced composite laminates

被引：131
作者：
Balzani, C. [1 ]
Wagner, W. [1 ]
机构：
[1] Univ Karlsruhe TH, Inst Baustatik, D-76131 Karlsruhe, Germany
来源：
ENGINEERING FRACTURE MECHANICS | 2008年 / 75卷 / 09期
关键词：
delamination; progressive damage; finite element; cohesive element; cohesive zone; interface element;
D O I：
10.1016/j.engfracmech.2007.03.013
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
Unidirectional fiber-reinforced composite laminates are widely Used in aerospace industry for a great variety of structural parts. In order to enhance the exploitation of material reserves, there is a need for the integration of progressive damage scenarios in the design phase. Due to their hazardous effects on the load-carrying capacity of composite structures, this work focusses Oil the simulation of delaminations. A finite element based on a cohesive zone approach is developed. Two constitutive laws are proposed. One is characterized by linear degradation after delamination onset, the other is governed by exponential softening response. The damage process is history-dependent leading to an irreversible stiffness degradation in damaged zones. The practicability of the proposed model and the assets and drawbacks of the two material laws are shown by some numerical examples. (c) 2007 Elsevier Ltd. All rights reserved.
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收藏
页码：2597 / 2615
页数：19
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