Impact-induced delamination of composites: a 2D simulation
Impact-induced delamination of composites: a 2D simulation
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DOI：
10.1016/s1359-8368(98)00013-4
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发表时间：
1998-01-01
影响因子：
13.1
通讯作者：
Baylor, JS
中科院分区：
文献类型：
--
作者：
Geubelle, PH;Baylor, JS
使用专门开发的二维内聚/体积有限元方案模拟薄复合材料板在低速冲击下的分层过程。沿内层边界和横向层内部引入粘性单元，以模拟横向基体裂纹和分层前沿的自发引发和扩展。该分析是在弹性有限变形理论的框架内进行的，以解释薄复合材料板的非线性刚化和伴随断裂过程的大旋转。该模拟是动态的并且使用显式的时间步长方案。与石墨/环氧树脂层压板现有实验的比较表明，内聚/体积有限元方案能够捕获导致分层的复杂机制，包括基体的初始微裂纹、关键横向基体裂纹的出现以及在关键基体裂纹与相邻层之间的交叉点处引发的分层裂纹的快速扩展。 (C) 1998 年由爱思唯尔科学有限公司出版。保留所有权利。
The delamination process in thin composite plates subjected to low-velocity impact is simulated using a specially developed 2D cohesive/volumetric finite element scheme. Cohesive elements are introduced along the boundaries of the inner layers and inside the transverse plies to simulate the spontaneous initiation and propagation of transverse matrix cracks and delamination fronts. The analysis is performed within the framework of the finite deformation theory of elasticity to account for the nonlinear stiffening of the thin composite plate and the large rotations which accompany the fracture process. The simulation is dynamic and uses an explicit time stepping scheme. Comparison with existing experiments performed on graphite/epoxy laminates indicates that the cohesive/volumetric finite element scheme is able to capture the complex mechanisms leading to the delamination, including the initial micro-cracking of the matrix, the appearance of critical transverse matrix cracks and the rapid propagation of delamination cracks initiated at the intersections between the critical matrix cracks and the adjacent plies. (C) 1998 Published by Elsevier Science Ltd. All rights reserved.