In:
Key Engineering Materials, Trans Tech Publications, Ltd., Vol. 353-358 ( 2007-9), p. 1125-1128
Abstract:
Modes I and II stress intensity factors are analyzed by means of a variational boundary
integral method (VBIM) for slant surface-breaking cracks in a half-plane with surface steps subject to contact loadings. This method represents the crack as a continuous distribution of dislocation
loops. The crack opening displacements, which are related to the geometry of loops and their Burgers vectors, can be determined by minimizing the elastic potential energy, obtained from the
known expressions of the interaction energy of a pair of dislocation loops, of the solid. In contrast to other methods, this approach finally reduces to a symmetric system of equations with milder
singularities of the type 1/R, which facilitate the numerical t reatments. By modeling the surface
boundary of the half-plane as half part of an infinite crack breaking through an infinite solid, this paper demonstrates that the VBIM can be well extended to solve the fracture problems of inclined
surface-breaking cracks in a half-plane with curve or step notches subject to combined contact loadings, and presents results of stress intensity factors for a variety of loadings, cracks and step
surface configurations. Numerical results of test examples are in good agreement with the existing results in the literature.
Type of Medium:
Online Resource
ISSN:
1662-9795
DOI:
10.4028/www.scientific.net/KEM.353-358
DOI:
10.4028/www.scientific.net/KEM.353-358.1125
Language:
Unknown
Publisher:
Trans Tech Publications, Ltd.
Publication Date:
2007
detail.hit.zdb_id:
2073306-9
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