基于失效理论的复合材料力学性能预测及试验验证

Prediction and experimental verification of mechanical properties of composite materials based on failure theories

针对纤维增强复合材料力学性能预测方法进行研究,采用实际试验和有限元仿真分析相结合的方法,分别利用Tsai-Wu张量理论及Hashin失效准则确定工况的失效机能,从而获得相应工况或加载条件的最大载荷、最大位移、弹性强度和杨氏模量等力学性能结果。将试验结果与仿真结果进行比对,结果表明Tsai-Wu张量理论对工况安全性能校核较为适用,Hashin失效准则更加适用于实际的极限强度预测。同时,建立的有限元仿真模型仿真结果与试验结果吻合度较好,说明该预测模型具有良好的合理性。

Aiming at the research of mechanical strength prediction methods of fiber reinforced composite material,the mechanical properties such as maximum load,maximum displacement,elastic strength,modulus and other mechanical properties were obtained by the method of actual test and simulation analysis through the HyperWorks and ABAQUS with Tsai-Wu tensor theory and Hashin failure criterion.By comparing the simulation results with the test results,it is found that the accuracy of prediction based on Tsai-Wu tensor theory is significantly lower than that based on Hashin,which indicates that Tsai-Wu tensor theory is more suitable for checking the working condition safety performance,and Hashin failure criterion is more suitable for the actual ultimate strength prediction.At the same time,the established simulation model is in good agreement with the experimental results,which indicates that the prediction model has good rationality.