基于霍普金森压杆系统的动态压痕实验

Dynamic indentation experiment based on the split-Hopkinson pressure bar system

设计了基于分离式Hopkinson压杆系统(SHPB)的动态压痕实验装置,使其能够获得动态压痕实验中试样的压痕位移和所受冲击载荷的实验数据,从而得到一种新的材料动态性能测试技术。对3种不同的材料进行了动态压痕实验,得到了材料的动态硬度和率敏感性等动态性能,与采用其他实验技术所测得的性能数据具有很好的一致性,并实现了利用动态压痕的方法获取材料的动态性能。

A new technology for testing dynamic properties of materials was proposed by developing an experimental setup based on a split-Hopkinson pressure bar system.The experimental setup can be used in dynamic indentation experiments to obtain the indentation displacements of materials and the impact load suffered by them.To validate the experimental setup,the ABAQUS/Explicit FE code was used to numerically simulate dynamic indentation experiments.Dynamic indentation experiments were conducted on aluminum alloy LY12,pure titanium and oxygen-free copper.The dynamic properties such as dynamic hardness and rate sensitivity were obtained for these three kinds of materials.The dynamic properties obtained by dynamic indentation experiments are consistent with those by other experimental methods.