中文摘要：

利用直径75mm的大尺寸SHPB实验装置开展盐岩的动态压缩性能实验研究,得到了其动态应力应变曲线。分析表明,在冲击压缩载荷作用下,盐岩材料有明显的损伤软化现象和应变率效应。针对实验曲线,通过引入描述材料强度随应变率强化的应变率增强因子和随不可逆变形发展而弱化的损伤因子,提出了含损伤率的相关动态本构模型,拟合得到的本构方程形式比较简单,能够较好地反映盐岩动态实验加载过程的主要特征,具有一定的工程应用价值。

英文摘要：

A 75mm large-diameter SHPB was used to study the dynamic compression property of salt rock. Dynamic stress-strain curve was obtained, and analysis reveals that the salt rock presents remarkable effect of strain hardening and damage softening. A dynamic constitutive model for the salt rock was proposed by using two variables： one is the strain rate strengthen factor to describe the strain hardening and the other one is the damage factor related to irreversible strain to describe the strain softening. The agreement between the constitutive relation and the experimental results is quite well. The new relation is relatively simple and easy obtained, hence, is worth in engineering application.