STUDY OF DYNAMIC UNIAXIAL COMPRESSIVE STRENGTH OF ROCK MATERIAL USING SLIDING CRACK MODEL
滑移型裂纹模型在研究岩石动态单轴抗压强度中的应用

The study of dynamic uniaxial compressive strength of granite at strain rate from 10 -4 to 10 0 s -1 is conducted using sliding crack model. It is shown that the theoretical strengths increase with increasing strain rate and agree well with the experimental results. It is suggested that crack growth velocity and the rate dependence of fracture toughness of rock material result in the strength increment with increasing strain rate.