Open Access

ARTICLE

A Cell-less BEM Formulation for 2D and 3D Elastoplastic Problems Using Particular Integrals

by A. Owatsiriwong¹, B. Phansri¹, K.H. Park¹

1 School of Engineering & Technology, Asian Instituteof Technology, P.O. Box 4, Klong Luang, Pathumthani 12120, Thailand
2 Corresponding author. Tel.: 66-2-524-5508; Fax: 66-2-524-5509. E-mail: khpark@ait.ac.th

Computer Modeling in Engineering & Sciences 2008, 31(1), 37-60. https://doi.org/10.3970/cmes.2008.031.037

Abstract

This study deals with the particular integral formulation for two (2D) and three (3D) dimensional elastoplastic analyses. The elastostatic equation is used for the complementary solution. The particular integrals for displacement, stress and traction rates are derived by introducing the concept of global shape function to approximate an initial stress rate term of the inhomogeneous equation. The Newton-Raphson algorithm for the plastic multiplier is used to solve the system equation. The developed program is integrated with the pre- and post-processor. The collapse analyses of the smooth flexible strip, square and circular footings are given by comparing the numerical results of the load-displacement response with those by other BEM and FEM programs. The results of evolution of plastic region and deformed shape with increasing load are also given to demonstrate the application and accuracy of the present formulation.

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Keywords

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