【摘要】 利用RMB-150B岩石力学试验系统研究了雅安大理岩围压为0～30 MPa的应力-应变全过程曲线,建立了屈服强度、峰值强度、残余强度和围压的关系,根据塑性力学的相关理论,提出双线性弹性-线性软化-残余理想塑性四线性模型,并应用于大理岩,得到了大理岩各段的本构方程,并特别讨论了软化段。结果表明,理论模型和试验结果吻合较好。更多还原

【Abstract】 Using the RMB-150B,the rock mechanics test system,the complete stress-strain curves of marble from Yaan,Sichuan province,and the relationship among the yield strength,peak strength,residual strength and the confining pressure are obtained. Based on the plastic theories,the bilinear elastic-linear strain softening- residual ideal plastic model is put forward and applied to marble,and the constitutive equation of marble is obtained. The constitutive equation of strain softening is discussed especially. The results indicate that the theoretic model fits well with the test.更多还原