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Modeling damage induced plasticity for low velocity impact simulation of three dimensional fiber reinforced composite

机译：三维纤维增强复合材料低速冲击模拟的损伤诱导塑性建模

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摘要

An elasto plastic damage model for three dimensional Fiber Reinforced Plastic (FRP) composite is proposed to simulate the progressive damage and damaged induced inelastic deformation in case of low velocity impact. Exponential softening model is implemented for damage growth prediction and a three dimensional plastic potential is used for plastic surface growth. An explicit code, VUMAT is written and implemented in ABAQUS/Explicit. The material softening parameter, m is determined from the finite element simulation of a single element model. Low velocity impact simulations are performed with graphite/epoxy laminate. De lamination behavior is simulated using surface based cohesive interaction between the two adjacent plies. The results show that the predicted behavior matches well with experimental observations. The model is successfully able to capture the central deflection of the laminate plate and permanent indentation on the surface. (C) 2015 Elsevier Ltd. All rights reserved.
机译：提出了三维纤维增强复合材料的弹塑性损伤模型，以模拟低速冲击情况下的渐进损伤和损伤诱导的非弹性变形。实施指数软化模型以预测损伤的增长，并使用三维塑性势用于塑性表面的增长。显式代码VUMAT是用ABAQUS / Explicit编写和实现的。材料软化参数m由单元素模型的有限元模拟确定。用石墨/环氧树脂层压板进行低速冲击模拟。分层行为是使用两个相邻层之间基于表面的粘合相互作用来模拟的。结果表明，预测行为与实验结果吻合良好。该模型能够成功捕获层压板的中心挠度和表面上的永久凹痕。 （C）2015 Elsevier Ltd.保留所有权利。

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