复合材料低速冲击永久凹坑深度预测方法

Prediction of Permanent Indentation Depth of Laminate Subjected to Low-Velocity Impact

基于赫兹接触定律,建立了复合材料层板低速冲击模型,在此基础上提出了复合材料层板冲击后永久凹坑的理论计算方法。通过对T700/5428和T300/5428两种材料层板低速冲击永久凹坑计算结果与试验结果的对比,证实了这种方法在较小冲击损伤情况下的可行性与有效性。通过这种方法,可以为复合材料冲击性能的预测提供一种参考。

A method is presented to calculate the depth of the permanent indentation of laminates after low-velocity impact.It is based on the Hertzian contact law,and uses the finite element simulation results of the low-velocity impact.Two typical materials,T700/5428 and T300/5428,are analyzed and a comparison of the contact force history and permanent indentation between the calculations and impact test results is given which shows the feasibility and effectiveness of this method in the case of small damage.The method can provide a reference to predict the performance of the composite.