A combined FEM and three-dimensional asymptotic solution based analysis on stress concentration/intensity around elliptical/circular cylinder shaped surface flaws in stretched plates

C0-type triangular “layered” plate elements, formulated on the assumptions of transverse inextensibility and layer-wise constant shear-angle theory (LCST) are employed to investigate the weakening effects of localized elliptical (circular being a special case) cylindrical surface flaws in isotropic...

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Vydáno v:Applied mathematical modelling Ročník 39; číslo 18; s. 5341 - 5353
Hlavní autor: Chaudhuri, Reaz A.
Médium: Journal Article
Jazyk:angličtina
Vydáno: Elsevier Inc 15.09.2015
Témata:
Circular cylindrical surface hole
Elliptical cylindrical surface hole
Quasi-three-dimensional
Shear deformation
Stress concentration factor (SCF)
Stress singularity
Quasi-three-dimensional
Stress singularity
Circular cylindrical surface hole
Stress concentration factor (SCF)
Elliptical cylindrical surface hole
Shear deformation
ISSN:0307-904X
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Shrnutí:C0-type triangular “layered” plate elements, formulated on the assumptions of transverse inextensibility and layer-wise constant shear-angle theory (LCST) are employed to investigate the weakening effects of localized elliptical (circular being a special case) cylindrical surface flaws in isotropic plates. Numerical results indicate severe transverse shear deformation in the vicinity of a surface flaw boundary. In addition, a recently developed asymptotic solution to the problem pertaining to the stress fields in the neighborhood of the circumferential corner line or line of intersection of a circular cylindrical external part-through open hole and an interior surface of an isotropic plate, subjected to far-field extension (mode I), in-plane shear (mode II) loadings, is presented. Most importantly, the effects of stress singularity in the neighborhood of the circumferential re-entrant corner lines of the elliptical/circular cylindrical surface flaws, weakening plates, are numerically assessed, because of their role in crack initiation.
ISSN:0307-904X
DOI:10.1016/j.apm.2014.11.067