Title
Multiple pole residue approach for 3D BEM analysis of mathematical degenerate and non-degenerate materials
Date Issued
03 June 2011
Access level
metadata only access
Resource Type
journal article
Author(s)
Buroni F.
Sáez A.
Universidad de Sevilla
Abstract
In this paper we develop an alternative boundary element method (BEM) formulation for the analysis of anisotropic three-dimensional (3D) elastic solids. Our implementation is based on the derivation of explicit expressions for the fundamental solution displacements and tractions, of general validity for any class of anisotropic materials, by means of Stroh formalism and Cauchy's residue theory. The resulting fundamental solution remains valid for mathematical degenerate cases when Stroh's eigenvalues are coincident, meanwhile it does not exhibit numerical instabilities for quasi-degenerate cases when Stroh's eigenvalues are nearly equal. A multiple pole residue approach is followed, leading to general explicit expressions to evaluate the traction fundamental solution for poles of m-multiplicity. Despite the existence of general displacement solutions in the literature, and for the sake of completeness, the same approach as for the traction solution is considered to derive the displacement fundamental solution as well. Based on these solutions, an explicit BEM approach for the numerical solution of 3D linear elastic problems for solids with general anisotropic behavior is presented. The analysis of cracked anisotropic solids is also considered. Details on the numerical implementation and its validation for degenerate cases are discussed. © 2010 John Wiley & Sons, Ltd.
Start page
1125
End page
1143
Volume
86
Issue
9
Language
English
OCDE Knowledge area
Ingeniería de materiales
Scopus EID
2-s2.0-79954605833
Source
International Journal for Numerical Methods in Engineering
ISSN of the container
10970207
Sources of information: Directorio de Producción Científica Scopus