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对复合材料的结构损伤演化过程的研究在飞机结构设计中具有越来越重要的工程指导意义。针对含低速冲击损伤层压板的压缩分析,提出了一种考虑层间损伤的三维有限元模型,该模型通过层间节点耦合方式,将复合材料层压板各子层粘合到一起,能准确、形象的模拟层间的相互作用。同时,基于累积损伤思想开发了复合材料层压板压缩过程的损伤仿真程序,该程序能够预测层压板在压缩载荷下面内和层间损伤的产生、发展及整体破坏过程。并以材料T300/5222为例,对含低速冲击损伤层压板的压缩强度进行了数值计算和试验研究,结果表明:该方法能较好的预测含冲击损伤层压板的压缩破坏载荷。
The research on the structural damage evolution of composite materials has an increasingly important engineering guiding significance in the design of aircraft structures. Aiming at the compression analysis of laminates with low velocity impact damage, a three-dimensional finite element model considering interlayer damage is proposed. Through the coupling between layers and nodes, the laminates of the composite material are bonded together, Image of the interaction between the simulation layer. At the same time, the damage simulation program of composite laminates compression process was developed based on the idea of cumulative damage. The program can predict the generation, development and overall damage of laminates under the compressive load. Taking T300 / 5222 as an example, the compressive strength of laminates with low velocity impact damage was numerically calculated and tested. The results show that this method can predict the compressive failure load of laminates with impact damage.