岩石破坏的损伤——断裂理论

岩石的破坏过程是损伤与断裂综合作用的结果,把损伤理论与断裂理论结合起来对岩石破坏过程进行分析是一种更切合实际的理论方法。利用损伤理论和断裂理论,首先推导了由于岩石的断裂韧性与损伤变量之间的定量关系;然后又讨论了脆性岩石中新裂纹的产生条件和起裂准则。结果表明:综合考虑损伤与断裂的破坏理论是能更好地反映岩石实际破坏过程的一种新的理论,可在以后的理论研究和实际工程中得以更为广泛的应用。

Damage and Fracture Theory of Rock Failure

The process of rock failure is the combined result by the action of damage and fracture, therefore it is a more reasonable theory method to analyze the rock failure process by means of damage theory and fracture theory. Based on damage theory and fracture theory, the quantitive relation between the rock fracture toughness and the damage variables is first deduced ; then the generation condition and initiation criterion of the new crack in the brittle rock. The result shows that the failure theory comprehensively considering damage and fracture is a new theory which can more actually reflect the failure process. And it must be more widely used in theoretical study and engineering.