论文部分内容阅读
为建立细观损伤与岩石宏观变形之间的定量关系,基于岩石强度的Weibull概率分布特征,结合损伤力学理论、统计强度理论与分形理论,考虑节理裂隙尺寸为分形分布和方位为正态分布的情况,建立岩石统计损伤本构模型和损伤演化方程,分析了损伤演化途径。给出与裂隙尺寸、尺寸分形维数和产状相关的本构模型参数,讨论了模型参数的物理意义和影响因素。结合前人试验测试结果加以验证,分析了统计损伤本构模型的合理性与不足之处。
In order to establish quantitative relationship between meso-damage and macro-deformation of rock, weibull probability distribution based on rock strength, combined with damage mechanics theory, statistical strength theory and fractal theory, considering fractal dimension of fractures as fractal and azimuth as normal distribution The statistical damage constitutive model and damage evolution equation of rock are established, and the pathways of damage evolution are analyzed. The constitutive model parameters related to fracture size, size fractal dimension and shape are given. The physical meaning and influencing factors of the model parameters are discussed. Combined with the results of previous experiments, the rationality and shortcomings of statistical damage constitutive model are analyzed.