岩石、岩体的动力强度与动力破坏准则

Dynamic Strength and Dynamic Fracture Criteria of Rock and Rock Mass

摘要:

就岩石与岩体变形与破坏的时间特性进行了理论研究.研究了岩石及岩体的强度对于应变率的依赖关系及其机理,给出了考虑强度对于应变率依赖关系的莫尔库仑准则,确定了岩体的破坏尺寸与应变率之间的关系.讨论了若干时间性破坏准则,揭示了它们之间的内在联系.最后讨论了动力强度理论的应用.

Abstract:

The paper presents a theoretical study of the temporal features of deformation and fracture of rock and rock mass and an investigation of the strain rate dependence of strength and its mechanism.The paper also presents the Mohr-Coulomb constitutive relations with a consideration of strain rate dependence and the relationship between the size of blocks of fractured rock mass and the strain rate.Several temporal fracture criteria are discussed,and their intrinsic relationship is revealed.Finally,the application of dynamic strength theories is discussed.