【摘要】 为了求得KDP晶体的应力-应变曲线以及材料的屈服应力,基于圣维南定理和实验得到的材料性能参数建立了KDP晶体的压痕过程仿真模型,利用ABAQUS有限元分析软件对KDP晶体压痕过程进行了有限元仿真,得到了KDP晶体的载荷-位移曲线和加/卸载过程中的等效应力变化规律.仿真结果表明:加载过程中最大应力集中在压头尖角处,卸载后最大应力分布在压头棱边所留下的压痕处,KDP晶体材料的屈服应力为120MPa.更多还原

【Abstract】 In order to obtain the stress-strain curve and yield stress of KDP crystal,a finite element simulation model of indentation process was developed based on the law of Sheng-Weinan and the material properties obtained by various experiments. The indentation process was simulated by ABAQUS finite element analysis software,and then the load-displacement curve and the changing laws of equivalent stress on the load/unload process were obtained.The results show that the maximal stress is founded existing in the tip of indenter in load process,and the maximal stress is founded existing in indentation on the surface in unload process; the yield stress of KDP crystal is 120 MPa.更多还原