A MESOSCOPIC MODEL OF DEFORMATION AND FAILURE FOR BRITTLE ROCKS
脆性岩石变形与破坏的细观力学模型研究

A mesoscopic model is presented to describe the mechanisms of deformation and failure for brittle rocks. In the loading process, the mechanical states of rocks are much related to microcracks. In the model, the macroscopic deformation of rocks is divided into three parts including deformation of rock media, deformation induced by the closure and sliding of micocracks, and deformation induced by the formation of kinked cracks. The closure, sliding and growth of microcracks of rocks are analyzed and the calculation formulae of each part are established. The above deformations are summed to obtain the stress strain curves in the loading process. Compared with testing data, it is shown that the laws of stress strain relationship obtained by two different methods are similar.