Effect of local plastic component on crack opening displacement and on J-integral of a circumferential penetrated crack

This paper describes the effect of local plastic component on J-integral and crack opening displacement (COD) evaluation of a circumferential penetrated crack, applicable to the leak before break (LBB) assessment for sodium cooled fast reactor (SFR) components. J-integral and COD evaluation methods...

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Autores principales:	Hideo MACHIDA, Manabu ARAKAWA, Takashi WAKAI
Formato:	article
Lenguaje:	EN
Publicado:	The Japan Society of Mechanical Engineers 2020
Materias:	crack opening displacement j-integral sodium cooled reactor piping leak-before-break Mechanical engineering and machinery TJ1-1570
Acceso en línea:	https://doaj.org/article/ccfcb55358a04fb9a458bd71db99fd14
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spelling	oai:doaj.org-article:ccfcb55358a04fb9a458bd71db99fd142021-11-29T05:56:30ZEffect of local plastic component on crack opening displacement and on J-integral of a circumferential penetrated crack2187-974510.1299/mej.19-00525https://doaj.org/article/ccfcb55358a04fb9a458bd71db99fd142020-02-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/mej/7/3/7_19-00525/_pdf/-char/enhttps://doaj.org/toc/2187-9745This paper describes the effect of local plastic component on J-integral and crack opening displacement (COD) evaluation of a circumferential penetrated crack, applicable to the leak before break (LBB) assessment for sodium cooled fast reactor (SFR) components. J-integral and COD evaluation methods are generally formulated as a summation of elastic and plastic components, and so far many evaluation formulae based on these two components have been proposed. However, strictly, the plastic component consists of local plastic and fully plastic components. Many of the conventional evaluation methods consider only the fully plastic component as the plastic component. The reason for this is that the effect of the local plastic component is much smaller than that of the fully plastic component excluding materials with extremely small work hardening. In contrast, for materials with high yield stress and small work hardening, such as modified 9Cr-1Mo steel which is one of the candidate materials for SFR’s piping, the effect of the local plastic component on J-integral and COD cannot be ignored. Therefore, the authors propose formulae taking the effect of local plastic component on J-integral and COD into account, based on finite element analysis (FEA) results, so that it is easy to apply to crack evaluation. The formulae will be employed in the guidelines on LBB assessment for SFR components published from Japan Society of Mechanical Engineers (JSME).Hideo MACHIDAManabu ARAKAWATakashi WAKAIThe Japan Society of Mechanical Engineersarticlecrack opening displacementj-integralsodium cooled reactorpipingleak-before-breakMechanical engineering and machineryTJ1-1570ENMechanical Engineering Journal, Vol 7, Iss 3, Pp 19-00525-19-00525 (2020)
institution	DOAJ
collection	DOAJ
language	EN
topic	crack opening displacement j-integral sodium cooled reactor piping leak-before-break Mechanical engineering and machinery TJ1-1570
spellingShingle	crack opening displacement j-integral sodium cooled reactor piping leak-before-break Mechanical engineering and machinery TJ1-1570 Hideo MACHIDA Manabu ARAKAWA Takashi WAKAI Effect of local plastic component on crack opening displacement and on J-integral of a circumferential penetrated crack
description	This paper describes the effect of local plastic component on J-integral and crack opening displacement (COD) evaluation of a circumferential penetrated crack, applicable to the leak before break (LBB) assessment for sodium cooled fast reactor (SFR) components. J-integral and COD evaluation methods are generally formulated as a summation of elastic and plastic components, and so far many evaluation formulae based on these two components have been proposed. However, strictly, the plastic component consists of local plastic and fully plastic components. Many of the conventional evaluation methods consider only the fully plastic component as the plastic component. The reason for this is that the effect of the local plastic component is much smaller than that of the fully plastic component excluding materials with extremely small work hardening. In contrast, for materials with high yield stress and small work hardening, such as modified 9Cr-1Mo steel which is one of the candidate materials for SFR’s piping, the effect of the local plastic component on J-integral and COD cannot be ignored. Therefore, the authors propose formulae taking the effect of local plastic component on J-integral and COD into account, based on finite element analysis (FEA) results, so that it is easy to apply to crack evaluation. The formulae will be employed in the guidelines on LBB assessment for SFR components published from Japan Society of Mechanical Engineers (JSME).
format	article
author	Hideo MACHIDA Manabu ARAKAWA Takashi WAKAI
author_facet	Hideo MACHIDA Manabu ARAKAWA Takashi WAKAI
author_sort	Hideo MACHIDA
title	Effect of local plastic component on crack opening displacement and on J-integral of a circumferential penetrated crack
title_short	Effect of local plastic component on crack opening displacement and on J-integral of a circumferential penetrated crack
title_full	Effect of local plastic component on crack opening displacement and on J-integral of a circumferential penetrated crack
title_fullStr	Effect of local plastic component on crack opening displacement and on J-integral of a circumferential penetrated crack
title_full_unstemmed	Effect of local plastic component on crack opening displacement and on J-integral of a circumferential penetrated crack
title_sort	effect of local plastic component on crack opening displacement and on j-integral of a circumferential penetrated crack
publisher	The Japan Society of Mechanical Engineers
publishDate	2020
url	https://doaj.org/article/ccfcb55358a04fb9a458bd71db99fd14
work_keys_str_mv	AT hideomachida effectoflocalplasticcomponentoncrackopeningdisplacementandonjintegralofacircumferentialpenetratedcrack AT manabuarakawa effectoflocalplasticcomponentoncrackopeningdisplacementandonjintegralofacircumferentialpenetratedcrack AT takashiwakai effectoflocalplasticcomponentoncrackopeningdisplacementandonjintegralofacircumferentialpenetratedcrack
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Effect of local plastic component on crack opening displacement and on J-integral of a circumferential penetrated crack

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