【作者】 汤立群； 陈爱民； 邱燕红； 刘逸平； 刘泽佳； 黄小清；

【Author】 TANG Li-qun, CHEN Ai-min, QIU Yan-hong,LIU Yi-ping, LIU Ze-jia,HUANG Xiao-qing (College of Traffic and Communications, South China University of Technology, Guangzhou 510641, China)

【机构】 华南理工大学交通学院；

【摘要】 本文利用大尺寸分离式霍普金森压杆试验系统,对一种新型的液体橡胶基混凝土材料的动态力学性能进行了研究。相对而言该材料的波阻抗较低,通过在输出杆使用半导体应变片,有效地测量到该材料的透射波形,从而得到材料的动态性质。实验结果表明,该材料具有双重应变率敏感特性,即在不同的应变率区间材料的应变率敏感性不同。最后基于Lemitre的损伤定义分析了该材料在冲击后的损伤特性。更多还原

【Abstract】 The dynamic properties of a new concrete based on liquid rubber by the Split Hopkinson Pressure Bars with large diameter. Because of the lower wave impedance comparatively, the semi-conductor strain gauge were used in the transmission bar to measure the transmission wave effectively, and obtain the dynamic properties of the material successfully. Experimental results show that the new material has double strain ratio sensitivities, i.e., the material has different kinds of sensitivity in different range of the strain ratio. Finally, the damage properties of the material were analyzed based on the damage definition by Lemitre.更多还原