TY - JOUR
T1 - Three-dimensional elastic-plastic j-integral calculations for semielliptical surface cracks in a tensile plate
AU - Nikishkov, G. P.
AU - Atluri, S. N.
N1 - Copyright:
Copyright 2014 Elsevier B.V., All rights reserved.
PY - 1988
Y1 - 1988
N2 - Using a finite element method, in conjunction with an equivalent domain integral approach, the elastic-plastic crack-tip J-integral is computed for semielliptical surface flaws in a plate under a remote tensile load. The computed elastic-plastic values of the J-integral are compared to the elastic ones. It is concluded that a linear elastic fracture mechanics approach can be used for semielliptical cracks of relative depth of a/t = 0.25 and aspect ratio of c/a ≦ 3, up to load levels of 0.9δy with an error of no more than 10% in the (equivalent) elastic-plastic stress intensity factor. A simple empirical equation for evaluating the elastic-plastic J-integral for surface flaws is proposed.
AB - Using a finite element method, in conjunction with an equivalent domain integral approach, the elastic-plastic crack-tip J-integral is computed for semielliptical surface flaws in a plate under a remote tensile load. The computed elastic-plastic values of the J-integral are compared to the elastic ones. It is concluded that a linear elastic fracture mechanics approach can be used for semielliptical cracks of relative depth of a/t = 0.25 and aspect ratio of c/a ≦ 3, up to load levels of 0.9δy with an error of no more than 10% in the (equivalent) elastic-plastic stress intensity factor. A simple empirical equation for evaluating the elastic-plastic J-integral for surface flaws is proposed.
UR - http://www.scopus.com/inward/record.url?scp=0023859421&partnerID=8YFLogxK
U2 - 10.1016/0013-7944(88)90008-2
DO - 10.1016/0013-7944(88)90008-2
M3 - Article
AN - SCOPUS:0023859421
VL - 29
SP - 81
EP - 87
JO - Engineering Fracture Mechanics
JF - Engineering Fracture Mechanics
SN - 0013-7944
IS - 1
ER -