Modeling of delamination using a discretized cohesive zone and damage formulation

被引：73
|
作者：
Borg, R [1 ]
Nilsson, L [1 ]
Simonsson, K [1 ]
机构：
[1] Linkoping Inst Technol, Div Solid Mech, Dept Mech Engn, SE-58183 Linkoping, Sweden
来源：
COMPOSITES SCIENCE AND TECHNOLOGY | 2002年 / 62卷 / 10-11期
关键词：
carbon fibers; laminates; delamination; crack;
D O I：
10.1016/S0266-3538(02)00070-2
中图分类号：
TB33 [复合材料];
学科分类号：
摘要：
Delamination initiation and growth are analyzed by using a discrete cohesive crack model. The delamination is constrained to grow along a tied interface. The model is derived by postulating the existence of a maximum load surface which limits the adhesive forces in the process zone of the crack. The size of this maximum load surface is made dependent on the amount of dissipated crack opening work, such that the maximum load surface shrinks to zero as a predefined amount of work is consumed. A damage formulation is used to reduce the adhesive forces. Mode I, II and III loading or any combined loading is possible. An analytical solution is obtained for a single mode opening and the implications of this result on the governing equations is discussed. The delamination model is implemented in the finite element code LS-DYNA and simulation results are shown to be in agreement with experimental results. (C) 2002 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码：1299 / 1314
页数：16
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