【作者】 赵习金； 卢芳云； 王悟； 李英华； 林玉亮；

【Author】 ZHAO Xi-Jin~(1,2,3),LU Fang-Yun~(1,2),WANG Wu~1,LI Ying-Hua~1,LIN Yu-Liang~2 (1.Laboratory for Shock Wave and Detonation Physics Research, Institute of Fluid Physics,CAEP,Mianyang 621900,China; 2.College of Science,National University cf Defense Technology, Changsha 410073,China; 3.Automobile Management Institute,Bengbu 233011,China)

【机构】 中国工程物理研究院流体物理研究所冲击波物理与爆轰物理实验室； 国防科技大学理学院； 解放军汽车管理学院；

【摘要】 在硅橡胶材料的分离式霍普金森压杆实验中,实验研究了如何实现常应变率加载,并且得到了整形器尺寸与加载应变率之间,以及加载应变率与试样厚度之间的定量关系。根据预估入射波形的理论模型,给出了采用H62黄铜整形器整形后入射波形的计算结果和实验结果,二者基本上是一致的。更多还原

【Abstract】 We modified the conventional Split Hopkinson Pressure Bar(SHPB) technique by shaping the incident pulse such that the samples are in dynamic stress equilibrium and in homogeneous deformation during the tests of silicon rubber.According to the method of pulse shaper designing,we had the sanples loaded under constant strain rate,and we got the direct relation between the size of pulse shaper and strain rate.A model to predict the incident waveform in the SHPB experiment by use of a single pulse shaper is built according to the theory of stress wave.Incident waveform from experiment and model prediction with H62 brass shaper are obtained.Model predictions are in good agreement with experimental results.更多还原