【摘要】 岩石中含有许多微裂纹和微空隙,其变形的非线性特征主要是由于这些微裂纹和微空隙闭合、张开和扩展的结果。本文根据损伤理论和有效模量法,考虑这些微缺陷的影响,建立损伤本构方程和损伤演变方程,并将其应用于根据岩石含空隙度不同所提出的三种模型。结果表明,理论曲线和实验曲线吻合。更多还原

【Abstract】 In a rock there are a lot of microcracks and microvoids, whose closing, opening and growth bring about the nonlinearity of its deformation. By taking into account the effect of the micro-defects, a constitutive relation and damage evolution equations have been developed based on damage mechanics and with the effective modules method. These equations have been applied to three models proposed according to the different porosities of the rocks. The theoretical curves are in good agreement with experimental ones.更多还原