Numerical analysis of effective elastic properties of geomaterials containing voids using 3D random fields and finite elements

INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES

卷:50

Article

Paiboon, Jumpol¹  Griffiths, D. V.^1,2  Huang, Jinsong²  Fenton, Gordon A.³ 

[1] Colorado Sch Mines, Dept Civil & Environm Engn, Golden, CO 80401 USA

[2] Univ Newcastle, Australian Res Council Ctr Excellence Geotech Sci, Callaghan, NSW 2308, Australia

[3] Dalhousie Univ, Dept Engn Math, Halifax, NS B3J 2X4, Canada

关键词: Random finite element method (RFEM);    Representative volume element (RVE);    Effective elastic properties;    Homogenization;   

DOI  :  10.1016/j.ijsolstr.2013.05.031

来源: Elsevier

【 摘 要 】

The purpose of the study is to investigate the influence of porosity and void size on effective elastic geotechnical engineering properties with a 3D model of random fields and finite element. The random field theory is used to generate models of geomaterials containing spatially random voids with controlled porosity and void size. A tied freedom analysis is developed to evaluate the effective Young's modulus and Poisson's ratio in an ideal block material of finite elements. To deliver a mean and standard deviation of the elastic parameters, this approach uses Monte-Carlo simulations and finite elements, where each simulation leads to an effective value of the property under investigation. The results are extended to investigate an influence of representative volume element (RVE). A comparison of the effective elastic stiffness of 2D and 3D models is also discussed. (C) 2013 Elsevier Ltd. All rights reserved.

【 授权许可】

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