考虑孔隙变形的孔隙介质本构关系初探  

Primary study of stress-strain constitutive relation for porous media

作　　者：邵龙潭[1] 孙益振[1] 

机构地区：[1]大连理工大学工程力学系工业装备结构分析国家重点实验室,大连116024

出　　处：《岩土力学》2006年第4期561-565,共5页Rock and Soil Mechanics

基　　金：教育部高等学校骨干教师资助计划资助(No.2000-65);留学回国人员科研启动基金资助项目(No.2001-345)

摘　　要：孔隙存在是孔隙介质材料结构的本质特征,它决定了孔隙介质的本构关系呈现更为复杂的性质。首先给出了孔隙介质的视应力、视应变、骨架实际应力和骨架实际应变的定义,并在理想孔隙介质的物质模型假定下讨论了理想孔隙介质的本构关系,表明即使孔隙介质的骨架结构满足虎克弹性体本构关系的假定,即假定骨架的实际应力与实际应变之间呈现线性关系,但由于孔隙的存在,孔隙介质的视应力与视应变之间还是呈现非线性,说明应力与变形之间的非线性是孔隙介质的固有特性。The existing of voids is the character of the porous media, which determine the constitution relation of porous media will be more complicated. A model of ideal porous media is presented. The apparent stress and apparent strain, actual stress and actual strain of skeleton for porous medium are defined. A discussion of the stress-strain relationship of the ideal porous medium suggests that although skeleton structure could be satisfied with the hypothesis of stress-strain linear elastic, the relationship between apparent stress and apparent strains remains nonlinear character. The nonlinear relation of stress and strain is the character of porous media.

关 键 词：孔隙介质 实际应力 实际应变 视应力 视应变 本构关系 

分 类 号：TU452[建筑科学—岩土工程]