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Civil-Comp Proceedings
ISSN 1759-3433
CCP: 66
COMPUTATIONAL MECHANICS: TECHNIQUES AND DEVELOPMENTS
Edited by: B.H.V. Topping
Paper IV.4

Elasto-plastic Analysis for Infinite and Semi-Infinite Problems using an Overlapping Iterative Coupled FEM and BEM

W.M. Elleithy and H.J. Al-Gahtani

Civil Engineering Department, King Fahd University of Petroleum and Minerals, Dhahran, Saudi Arabia

Full Bibliographic Reference for this paper
W.M. Elleithy, H.J. Al-Gahtani, "Elasto-plastic Analysis for Infinite and Semi-Infinite Problems using an Overlapping Iterative Coupled FEM and BEM", in B.H.V. Topping, (Editor), "Computational Mechanics: Techniques and Developments", Civil-Comp Press, Edinburgh, UK, pp 89-97, 2000. doi:10.4203/ccp.66.4.4
Abstract
An overlapping iterative domain decomposition algorithm for coupling the finite element method (FEM) and the boundary element method (BEM) is presented in this paper. In this proposed method, the domain of the original problem is subdivided into a FEM sub-domain and a BEM sub-domain, such that the two sub-domains partially overlap over a common region. The method is most suitable for the elastoplastic analysis of infinite and semi-infinite problems. It handles situations where the natural boundary conditions are specified on the entire external boundary of the FEM or BEM sub-domains. Such situations cannot be modeled using the existing non-overlapping iterative coupling methods. The method is implemented in a computer program, which is tested through numerical examples. The solution of the present method is compared to the conventional finite element method in terms of accuracy and CPU-time.

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