Plastic influence functions for calculating J-integral of complex-cracks in pipe
- Authors
- Jeong, Jae-Uk; Choi, Jae-Boong; Kim, Moon-Ki; Huh, Nam-Su; Kim, Yun-Jae
- Issue Date
- 10월-2016
- Publisher
- ELSEVIER SCI LTD
- Keywords
- Complex crack; Finite element analysis; GE/EPRI method; J-Integral; Plastic influence functions
- Citation
- INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING, v.146, pp.11 - 21
- Indexed
- SCIE
SCOPUS
- Journal Title
- INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING
- Volume
- 146
- Start Page
- 11
- End Page
- 21
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/87351
- DOI
- 10.1016/j.ijpvp.2016.07.003
- ISSN
- 0308-0161
- Abstract
- this study, the plastic influence functions, h(1), for estimates off-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 pestimation 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.] prediction method can be utilized to assess instability of a complex crack in pipes for R-O material. (C) 2016 Elsevier Ltd. All rights reserved.
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