岩石矿物细胞元模型的精细模拟试验验证  

Refined simulation experiment for verification of rock mineral cell unit model

作　　者：曾亚武[1] 王勇凯[1] 丁世伟[1] 李士平[1] 罗荣[1] 

机构地区：[1]武汉大学土木建筑工程学院,湖北武汉430072

出　　处：《武汉大学学报（工学版）》2014年第2期217-221,259,共6页Engineering Journal of Wuhan University

基　　金：国家自然科学基金项目(编号:41272342)

摘　　要：根据岩石矿物细胞元随机性参数赋值方法的基本思想,运用非均质岩石材料精细模拟试验方法,完成了考虑2类不同矿物细胞元构成的非均质岩石精细模型试件的制作,利用非均质岩石模型试件进行了单轴压缩研究,并结合数值模拟相关研究结果进行分析.结果表明,非均质岩石材料的变形特征由其组成矿物细胞元的变形特征决定;非均质岩石模型试件的弹性模量、极限强度等力学参数受矿物细胞元的影响较大;非均质岩石材料的宏观力学参数可用细观力学参数的平均值来表示,验证了运用数值模拟方法进行非均质岩石材料力学特性研究中的相关结论,为利用岩石矿物细胞元随机性参数赋值方法进行岩石材料非均质特性的研究提供了物理试验支撑.Based on the method of random parameter assignment of rock mineral cell unit, refined simulation experiment for heterogeneous rock material is implemented to make refined model specimens of hetero- geneous rock with two mineral cell units under laboratory conditions. The refined model specimens are used to carry out uniaxial compression tests, The results of the mechanical tests are analyzed combining results of numerical tests. The research results indicate that the deformation characteristics of heterogeneous rock material depend on deformation characteristics of their mineral cell units; mineral cell units have im- portant influences on mechanical parameters （elastic modulus and ultimate strength） of the refined model specimens of heterogeneous rock. The average of microscopic mechanical parameters can be used to represent macroscopic mechanical parameters of heterogeneous rock material. The conclusions of mechanical tests are coincident with the relevant conclusions of numerical tests, serving as a physical experiment support for applying random parameter assignment method of rock mineral cell unit to research the heterogeneity of heterogeneous rock material.

关 键 词：非均质岩石 矿物细胞元 精细模拟 单轴压缩试验 

分 类 号：TU45[建筑科学—岩土工程]