单轴压缩条件下脆性岩石变形破坏的理论、试验与数值模拟

Theoretical, Experimental and Numerical Studies on Deformation and Failure of Brittle Rock in Uniaxial Compression

利用损伤力学对脆性岩石在单轴压缩条件下的变形破坏行为进行了理论分析,并利用数值模拟试验机(RFPA)、伺服控制试验系统(RMT 150B)分别对岩石进行了数值及实验室试验,将理论分析曲线、数值试验及实验室试验曲线进行了对比研究,分析了理论结果、数值试验及实验室试验结果之间的联系与差别(尤其是全程应力应变之间的差别)以及产生这些差别的原因,结果表明数值试验并不是理论解析方法的简单重复,而是反映和研究岩石变形破坏全过程的有力手段·

The deformation and failure behavior of brittle rock in uniaxial compression were analyzed to establish a theoretical constitutive damage model based on damage mechanics. The numerical and experimental tests for brittle rock specimens(coal specimens included) in uniaxial compression were also carried out to obtain the complete stressstain curves of the rocks using numerical testing machine(RFPA) and servocontrolled testing machine (RMT150B), respectively. Based on the theoretical,numerical and experimental results,the relations and differences of complete stressstrain curves were contrastively investigated. It is concluded that numerical simulation is not a simple duplication for analytical method but an effective method to investigate the complete process of rock deformation and failure.