【摘要】 采用滑动裂纹模型模拟岩石体内存在的缺陷,建立了基于断裂力学机理的岩石微元强度理论,并根据连续损伤力学和统计损伤理论,提出考虑损伤阈值的岩石损伤统计本构模型。根据脆性岩石的常规三轴试验结果对其进行比较验证,应力—应变曲线的理论结果与试验结果基本吻合。更多还原

【Abstract】 A rock strength criterion is established by adopting the sliding crack model to simulate the pre-existing defects in rocks based on mechanism of fracture mechanics.Then a statistical damage constitutive model considering damage threshold is proposed according to the continuum damage mechanics and the statistical damage theory.The proposed constitutive equation is verified by triaxial experiment of brittle rock The stress-strain curves agree with well by comparing the theoretical constitutive model with the experimental results.更多还原