岩石损伤本构模型研究

基于应变强度理论和岩石微元强度服从幂函数分布的假定,利用统计损伤力学的理论,建立了岩石破坏过程中的损伤统计本构模型,并引用试验资料对模型进行了验证。验证结果表明:模型理论曲线与试验实测曲线具有较高的吻合度,所建模型能够比较好的反映岩石在三向压力作用下的应力—应变关系和岩石强度变化特征,说明本文所建立的模型是合理的。

Study on Damage Constitutive Model of Rock

Based on the strain strength theory and the strength characteristics of rock micro-unit with power function distribution,a rock damage constitutive model was established under triaxial stress state by use of the damage constitutive theory of continuous medium.Then the constitutive model was verified by test data of triaxial experiment and the result indicates that the proposed constitutive model can reflect the relationship between stress and strain of rock and the process of rock failure accurately.So,the proposed constitutive model is rational and feasible.