基于滑动裂纹模型的岩石损伤统计本构模型  

Statistical constitutive model for rock based on sliding crack model

作　　者：徐士良[1] 

机构地区：[1]安徽建筑工业学院岩土工程系,合肥230022

出　　处：《安徽建筑工业学院学报（自然科学版）》2012年第2期23-26,共4页Journal of Anhui Institute of Architecture(Natural Science)

基　　金：安徽省教育厅自然基金项目(KJ2011B040);安徽建筑工业学院博士启动基金项目(k025301)

摘　　要：采用滑动裂纹模型模拟岩石体内存在的缺陷,建立了基于断裂力学机理的岩石微元强度理论,并根据连续损伤力学和统计损伤理论,提出考虑损伤阈值的岩石损伤统计本构模型。根据脆性岩石的常规三轴试验结果对其进行比较验证,应力—应变曲线的理论结果与试验结果基本吻合。A rock strength criterion is established by adopting the sliding crack model to simulate the pre--existing defects in rocks based on mechanism of fracture mechanics. Then a statistical damage constitutive model considering damage threshold is proposed according to the continuum damage me- chanics and the statistical damage theory. The proposed constitutive equation is verified by triaxial ex- periment of brittle rock The stress-strain curves agree with well by comparing the theoretical constitu- tive model with the experimental results.

关 键 词：滑动裂纹模型 损伤力学 本构模型 脆性岩石 

分 类 号：TU43[建筑科学—岩土工程]