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Green's function expansion for exponentially graded elasticity
Faculty
Science
Year:
2010
Type of Publication:
Article
Pages:
756-772
Authors:
Matbuly, M. S, Sallah, Omar M, Gray, L. J, Amer, M. A
DOI:
10.1002/nme.2786
Journal:
INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING JOHN WILEY \& SONS LTD
Volume:
82
Research Area:
Engineering; Mathematics
ISSN
ISI:000276914300004
Keywords :
functionally graded materials, Green's function, boundary integral equation, Galerkin boundary element method
Abstract:
New computational forms are derived for Green's function of an exponentially graded elastic material in three dimensions. By suitably expanding a term in the defining inverse Fourier integral, the displacement tensor can be written as a relatively simple analytic term, plus a single double integral that must be evaluated numerically. The integration is over a fixed finite domain, the integrand involves only elementary functions, and only low-order Gauss quadrature is required for an accurate answer. Moreover, it is expected that this approach will allow a far simpler procedure for obtaining the first and second-order derivatives needed in a boundary integral analysis. The new Green's function expressions have been tested by comparing with results from an earlier algorithm. Copyright (C) 2009 John Wiley \& Sons, Ltd.
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