TY - JOUR
T1 - SGBEM-FEM alternating method for analyzing 3D non-planar cracks and their growth in structural components
AU - Nikishkov, G. P.
AU - Park, J. H.
AU - Atluri, S. N.
PY - 2001
Y1 - 2001
N2 - An efficient and highly accurate, Symmetric Galerkin Boundary Element Method - Finite Element Method - based alternating method, for the analysis of three-dimensional non-planar cracks, and their growth, in structural components of complicated geometries, is proposed. The crack is modeled by the symmetric Galerkin boundary element method, as a distribution of displacement discontinuities, as if in an infinite medium. The finite element method is used to perform the stress analysis for the uncracked body only. The solution for the structural component, containing the crack, is obtained in an iteration procedure, which alternates between FEM solution for the uncracked body, and the SGBEM solution for the crack in an infinite body. Numerical procedures, and the attendant Java code, are developed for the evaluation of stress intensity factors, and fatigue crack growth modeling. Examples for non-planar cracks in infinite media, and for planar cracks in finite bodies, as well as their growth under fatigue, demonstrate the accuracy of the method.
AB - An efficient and highly accurate, Symmetric Galerkin Boundary Element Method - Finite Element Method - based alternating method, for the analysis of three-dimensional non-planar cracks, and their growth, in structural components of complicated geometries, is proposed. The crack is modeled by the symmetric Galerkin boundary element method, as a distribution of displacement discontinuities, as if in an infinite medium. The finite element method is used to perform the stress analysis for the uncracked body only. The solution for the structural component, containing the crack, is obtained in an iteration procedure, which alternates between FEM solution for the uncracked body, and the SGBEM solution for the crack in an infinite body. Numerical procedures, and the attendant Java code, are developed for the evaluation of stress intensity factors, and fatigue crack growth modeling. Examples for non-planar cracks in infinite media, and for planar cracks in finite bodies, as well as their growth under fatigue, demonstrate the accuracy of the method.
KW - 3D non-planar crack
KW - Alternating
KW - FEM
KW - SGBEM
UR - http://www.scopus.com/inward/record.url?scp=0038382278&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:0038382278
SN - 1526-1492
VL - 2
SP - 401
EP - 422
JO - CMES - Computer Modeling in Engineering and Sciences
JF - CMES - Computer Modeling in Engineering and Sciences
IS - 3
ER -