高应变率下岩石本构特性的研究

高应变率下岩石的动态本构关系和力学特性，目前主要是利用SHPB装置等来获得．基于统计学和损伤力学的观点，建立岩石在高应变率下的动态本构模型是进一步研究爆破机理、爆炸应力波传播、爆破参数优化的基础。理论和实验证明，本文推荐的4种动态本构模型与试验结果有较好的一致性，对进一步研究岩石的动态力学性质奠定了基础．

STUDY ON CONSTITUTIVE PROPERTIES OF ROCKS UNDER HIGH STRAIN RATES

Split Hopkinson Pressure Bar (SHPB) has been used to study the constitutive and mechanical properties of rocks under high strain rates. The dynamic constitutive models of rocks based on statistics and damage mechanics are given in this paper. These models are the basis of studying blasting mechanism, stress wave propagation and parameter optimization. Proved by the theory and practice, four constitutive models are in consistent with the result of experiments. They are of great importance to the study of dynamic mechanic properties of rocks.