Simulating Low-velocity Impact for Composite Laminates Based on Strain Damage Model
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摘要: 提出了一种基于应变的复合材料损伤模型,考虑了复合材料冲击过程中出现的面内纤维断裂与压缩,基体开裂与挤裂。在使用Abaqus软件进行数值模拟计算时,自编的用户子程序VUMAT和Cohe-sive模型分别实现了复合材料面板的损伤和层间分层。通过对层合板在不同能量下的低速冲击的有限元模拟发现,模拟得到的分层损伤形状和面积、冲头最大挠度、接触力和凹坑深度都与试验结果吻合较好。
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关键词:
- 复合材料 /
- 低速冲击 /
- Cohesive模型 /
- 分层损伤
Abstract: In this paper,the strain damage model of composite laminate is proposed to conside the fracture,matrixcracking,fiber tension and fiber compression caused by the impact. In the numerical simulation,the user subrou-tine VUMAT and the cohesive model in Abaqus software are chosen to describe the damage and delamination of theinterfaces between different composite laminates. The low-velocity impact for composite laminates under differentamount of is simulated. The simulation results show that the simulated delamination damage area,contact force,the maximum deflection of the impactor and the dent depth agree well with experimental results.-
Key words:
- composite materials /
- low-velocity impact /
- cohesive model /
- delamination
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