纤维增强复合材料低速冲击损伤模型的建立及验证

目的分析纤维增强复合材料在低速冲击下的损伤机理,更好地对材料的冲击损伤进行预测。方法建立包含界面相的细观力学模型,在此基础上结合冲击对复合材料的影响,建立单层板的宏观冲击模型。最后通过试验和有限元模拟对模型进行验证。结果有限元模拟得到的结果与实验得到的结果吻合得很好。结论从细观力学层面出发建立的冲击模型能够很好地预测纤维增强复合材料的冲击损伤。

Establishment and Verification of FRP Damage Model under Low-velocity Impact

Objective To analyze the damage of composite laminates under low-velocity impact, in order to better predict the impact damage. Methods The RVE model including the interphase was established, based on which the macroscopic impact model was established considering the influence of impact. At last, the model was verified with test and finite element simulation. Results The variation rules of hydrogen and oxygen concentrations with time in different environments were obtained. The suitable working environment for electrochemical solid-state hydrogen sensor was found by analyzing the test data and its working life in different storage circumstances was estimated. Conclusion The impact model established from the mesomechanics level could predict the impact damage of FRP very well.