Plastic influence functions for calculating J-integral of complex-cracks in pipe

Jae Uk Jeong, Jae Boong Choi, Moon Ki Kim, Nam Su Huh, Yun Jae Kim

研究成果: Article

7 引用 (Scopus)

抄録

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.

元の言語English
ページ(範囲)11-21
ページ数11
ジャーナルInternational Journal of Pressure Vessels and Piping
146
DOI
出版物ステータスPublished - 2016 10 1
外部発表Yes

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Pipe
Plastics
Cracks
Stainless Steel
Bending moments
Stainless steel

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

これを引用

Plastic influence functions for calculating J-integral of complex-cracks in pipe. / Jeong, Jae Uk; Choi, Jae Boong; Kim, Moon Ki; Huh, Nam Su; Kim, Yun Jae.

:: International Journal of Pressure Vessels and Piping, 巻 146, 01.10.2016, p. 11-21.

研究成果: Article

Jeong, Jae Uk ; Choi, Jae Boong ; Kim, Moon Ki ; Huh, Nam Su ; Kim, Yun Jae. / Plastic influence functions for calculating J-integral of complex-cracks in pipe. :: International Journal of Pressure Vessels and Piping. 2016 ; 巻 146. pp. 11-21.
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abstract = "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.",
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AU - Choi, Jae Boong

AU - Kim, Moon Ki

AU - Huh, Nam Su

AU - Kim, Yun Jae

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

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