Efficient Elasto-plastic Analysis Via An
Adaptive Finite Element-boundary
Element Coupling Method
Author(s)
W. Elleithy & U. Langer
Abstract
This paper presents an adaptive FEM-BEM coupling method for elasto-plastic
analysis. The proposed method is valid for both two- and three-dimensional
applications. The method takes care of the evolution of the elastic and plastic
regions and avoids some limitations of the standard FEM-BEM coupling
approaches. It estimates the FEM and BEM sub-domains and automatically
generates/adapts the FEM and BEM meshes/sub-domains, according to the state
of computation. The method eliminates the cumbersome trial and error process
in the identification of the FEM and BEM sub-domains in the standard FEMBEM
coupling approaches. An example application confirms the effectiveness of
the proposed method.
Keywords: FEM, BEM, elasto-plasticity, adaptive coupling.
1 Introduction
There exist many application contexts where coupling of the finite element
method (FEM) and the boundary element method (BEM) is, in principle, very
attractive. Examples include, but not limited to, elasto-plastic applications with
limited spread of plastic deformations. The FEM is utilized where the plastic
material behaviour is expected to develop. The remaining bounded/unbounded
linear elastic regions are best approximated by the BEM.
A crucial aspect of the existing (standard) FEM-BEM coupling approaches is
that they require the user/analyst to predefine and manually localize the FEM and
Keywords
FEM, BEM, elasto-plasticity, adaptive coupling.
Related Book
Other papers in this volume
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