摘要
本文在对脆性岩石力学性质的实验研究的基础上,探讨了脆性岩石的广义弹性模量,广义弹性泊松比,不可逆变形泊松比以及岩石的损伤变形特征,从而定义了新的岩石损伤表征量.建立了脆性岩石的弹性损伤耦合本构方程和损伤演化方程.并采用石英砂岩对所建立的岩石损伤本构方程在单轴压缩实验中进行验证,结果表明,理论分析与实验结果吻合较好.
on the basis of the experimental studies of mechanical properties in brittle rock,the generalized elastic modulus,generalized elastic Poisson ratio,irreversible deformation Poisson ratio and damage deformation characteristic arediscussed.And then,a new damage variable is defined.A new nonlinear elastic-damage constitutive equation is built and the damage evolution equation is proposed.The nonlinear elastic-damage constitutive equation is verified in the uniaxialcompression test of quartz sandstone in Chongqing.The results show that reasonableagreement exists between the theoretical analysis and the experimental data.
关键词
脆性
岩石
损伤
本构理论
非线性
brittle rock
nonlinear
damage
constitutive equation
