断裂力学在岩石中的探索

来源期刊：中南大学学报(自然科学版)1991年第6期

论文作者：黎振兹

文章页码：27 - 33

关键词：岩石; 能量平衡; 稳定性准则; 应变能密度因子; 复应力函数

Key words：rock; energy balance; stability criterion; strain energy density factor; complex stress function

摘    要：本文从能量平衡观点并通过坐标变换建立了岩石内裂纹的扩展条件;据此,导出了剪切断裂稳定性准则,其结果与文[1]相同。文中试用应变能密度因子理论分析与解释了岩石材料的单轴抗压强度远大于其单轴抗拉强度。并用复应力函数探讨了岩体内闭合裂纹端应力强度因子的表达式。最后,指出了当前岩石断裂力学中存在的主要问题。

Abstract: This study derives crack growth condition in rock from energy balance and by coordinate transformation. Based on this, shear fracture stability criterion have been derived, and the result is in agreement with the result of investigation [1]. Uniaxial compression strength much larger than uniaxialtension strength of rock material is analysed and explained using S theory in this paper. The formula of SIF for the closed crack tip in rock mass is studied using complex stress function. Finally, the essential problem activatedin rock fracture mechanics is presented.