维普中文期刊产品整合服务

THEORETICAL MODEL OF EFFECTIVE STRESS COEFFICIENT FOR ROCK/SOIL-LIKE POROUS MATERIALS

查看全文 作　　者：Kai Zhang Hui Zhou Dawei Hu Yang Zhao Xiating [1]Feng 高影响力作者 机构地区：[1]State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China高影响力机构 出　　处：《Acta Mechanica Solida Sinica》索引2009年第22卷第3期,共10页高影响力期刊 基　　金：supported by the Yalongjiang River Joint Fund by the National Natural Science Foundation of China(NSFC);Ertan Hydropower Development Company,LTD(Nos.50579091 and 50539090);NSFC(No.10772190);Major State Basic Research Project of China(No.2002CB412708) 摘　　要：Physical mechanisms and influencing factors on the effective stress coeffcient for rock/soil-like porous materials are investigated,based on which equivalent connectivity index is proposed.The equivalent connectivity index,relying on the meso-scale structure of porous ma-terial and the property of liquid,denotes the connectivity of pores in Representative Element Area(REA).If the conductivity of the porous material is anisotropic,the equivalent connec-tivity index is a second order tensor.Based on the basic theories of continuous mechanics and tensor analysis,relationship between area porosity and volumetric porosity of porous materials is deduced.Then a generalized expression,describing the relation between effective stress coeff-cient tensor and equivalent connectivity tensor of pores,is proposed,and the expression can be applied to isotropic media and also to anisotropic materials.Furthermore,evolution of porosity and equivalent connectivity index of the pore are studied in the strain space,and the method to determine the corresponding functions in expressions above is proposed using genetic algorithm and genetic programming.Two applications show that the results obtained by the method in this paper perfectly agree with the test data.This paper provides an important theoretical support to the coupled hydro-mechanical research. 关 键 词：多孔材料 应力系数 岩石 土壤样 连接性指数 各向异性材料 模型 二阶张量
相关文献

参考文献(10)

引证文献(6)

耦合文献(10)

网站首页 | 关于我们 | 联系我们 | 产品服务 | 客服中心 | 广告服务 | 版权声明 | 网站联盟 | 友情链接 | 售卡网点

版权所有© 渝B2-20050021-1　渝公网安备 50019002500403号　违法和不良信息举报中心

互联网出版许可证 新出网证(渝)字10号 全国400电话 - 免长途话费