TY - JOUR
T1 - Plastic influence functions for calculating J-integral of complex-cracks in pipe
AU - Jeong, Jae Uk
AU - Choi, Jae Boong
AU - Kim, Moon Ki
AU - Huh, Nam Su
AU - Kim, Yun Jae
N1 - Publisher Copyright:
© 2016 Elsevier Ltd
PY - 2016/10/1
Y1 - 2016/10/1
N2 - In this study, the plastic influence functions, h1, for estimates of J-integral of a pipe with a complex crack were newly proposed based on the systematic 3-dimensional (3-D) elastic-plastic finite element (FE) analyses by using Ramberg-Osgood (R-O) relation, in which global bending moment, axial tension and internal pressure were considered as loading conditions. Based on the present plastic influence functions, the GE/EPRI-type J-estimation scheme for complex-cracked pipes was suggested, and the results from the proposed J-estimation were compared with the FE results using both R-O fit parameters and actual tensile data of SA376 TP304 stainless steel. The comparison results demonstrate that although the proposed scheme provided sensitive J estimations according to fitting ranges of R-O parameters, it showed overall good agreements with the FE results using R-O relation. Thus, the proposed engineering J prediction method can be utilized to assess instability of a complex crack in pipes for R-O material.
AB - In this study, the plastic influence functions, h1, for estimates of J-integral of a pipe with a complex crack were newly proposed based on the systematic 3-dimensional (3-D) elastic-plastic finite element (FE) analyses by using Ramberg-Osgood (R-O) relation, in which global bending moment, axial tension and internal pressure were considered as loading conditions. Based on the present plastic influence functions, the GE/EPRI-type J-estimation scheme for complex-cracked pipes was suggested, and the results from the proposed J-estimation were compared with the FE results using both R-O fit parameters and actual tensile data of SA376 TP304 stainless steel. The comparison results demonstrate that although the proposed scheme provided sensitive J estimations according to fitting ranges of R-O parameters, it showed overall good agreements with the FE results using R-O relation. Thus, the proposed engineering J prediction method can be utilized to assess instability of a complex crack in pipes for R-O material.
KW - Complex crack
KW - Finite element analysis
KW - GE/EPRI method
KW - J-integral
KW - Plastic influence functions
UR - http://www.scopus.com/inward/record.url?scp=84994464067&partnerID=8YFLogxK
U2 - 10.1016/j.ijpvp.2016.07.003
DO - 10.1016/j.ijpvp.2016.07.003
M3 - Article
AN - SCOPUS:84994464067
SN - 0308-0161
VL - 146
SP - 11
EP - 21
JO - International Journal of Pressure Vessels and Piping
JF - International Journal of Pressure Vessels and Piping
ER -