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Low-speed impact damage analysis of aviation composite material structure

机译：航空复合材料结构的低速冲击损伤分析

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Although the carbon fiber reinforced composite material has high specific strength and stiffness, design-versatility, anti-corrosion and other excellent features, but the impact resistance of composite structures is poor. Therefore, the composite laminates low-speed damage analysis has important significance. Based on a three-dimensional analysis theory of cumulative damage, using the commercial finite element analysis software ABAQUS to establish laminates subjected to low velocity impact finite element model. according to the numerical results and the consistency of the test results, shows that the used model of the article is reasonable and accurate, and the numerical simulation method is verified to be feasible. Finally, through the numerical simulation of process of laminated plates low speed impact damage, the damage characteristics and damage mechanism of the laminates at different times are analyzed, and the forming reasons and expanding rules of the main damage forms of fiber damage and matrix damage are revealed.
机译：虽然碳纤维增强复合材料具有高比强度和刚度，设计 - 多功能性，抗腐蚀等优异特征，但复合结构的抗冲击性差。因此，复合层压板低速损伤分析具有重要意义。基于三维分析理论的累积损坏，采用商业有限元分析软件ABAQ，建立了低速冲击有限元模型的层压板。根据数值结果和测试结果的一致性，表明该物品的使用模型是合理和准确的，并且验证了数值模拟方法可行。最后，通过层压板工艺的数值模拟低速冲击损伤，分析了层压板在不同时间的损伤特性和损伤机理，以及形成纤维损伤和基质损伤的主要损伤形式的成立原因和扩展规则透露。

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