Numerical study of the effect of the composite patches on the stress intensity factors for a circumferential fully crack in pipes

The purpose of this paper is to reinforce the pressurized pipe containing a fully circumferential crack (internal and external) using composite patches due to their remarkable properties. In the research procedure, in order to validate the proposed models, firstly, a cylindrical pipe with a circumfe...

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Autores principales:	Seyed Mehdi Nabavi, Amin Pourabdol, Majid Jamal-Omidi
Formato:	article
Lenguaje:	FA
Publicado:	Iranian Society of Structrual Engineering (ISSE) 2020
Materias:	fully circumferential crack (internal and external) stress intensity factor composite patch repair the finite element cylindrical pipe Bridge engineering TG1-470 Building construction TH1-9745
Acceso en línea:	https://doaj.org/article/3c3a11e0a4764256889595ea145463b1
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spelling	oai:doaj.org-article:3c3a11e0a4764256889595ea145463b12021-11-08T15:53:07ZNumerical study of the effect of the composite patches on the stress intensity factors for a circumferential fully crack in pipes2476-39772538-261610.22065/jsce.2018.112332.1415https://doaj.org/article/3c3a11e0a4764256889595ea145463b12020-03-01T00:00:00Zhttps://www.jsce.ir/article_65310_ff19f138cc37346b0628dcfdcd5684f7.pdfhttps://doaj.org/toc/2476-3977https://doaj.org/toc/2538-2616The purpose of this paper is to reinforce the pressurized pipe containing a fully circumferential crack (internal and external) using composite patches due to their remarkable properties. In the research procedure, in order to validate the proposed models, firstly, a cylindrical pipe with a circumferential crack subjected to the uniform tension was modeled and the results of stress intensity factors were compared with an existing paper. Then, in order to examine the modeling process of composite patch and adhesive, a damaged plate with a central crack was considered and the results of stress intensity factors were investigated and evaluated. Stress intensity factor at the crack tip was calculated using the J-integral. In this regard, using the 3D finite element method, the stress intensity factors in the crack before and after the pipe repair were evaluated with boron/epoxy, carbon/epoxy and glass/epoxy composite patches. The crack geometries correspond to different relative depths from 0.4 to 0.8. The results showed that the use of composite patches significantly decreased the stress intensity factors, and this reduction in the external circumferential cracks is more than the internal ones. Also, in the research process, the effect of the patch thickness, the angle of the fiber and the adhesive material on the stress intensity factors has been investigated.Seyed Mehdi NabaviAmin PourabdolMajid Jamal-OmidiIranian Society of Structrual Engineering (ISSE)articlefully circumferential crack (internal and external)stress intensity factorcomposite patchrepairthe finite elementcylindrical pipeBridge engineeringTG1-470Building constructionTH1-9745FAJournal of Structural and Construction Engineering, Vol 7, Iss 1, Pp 240-254 (2020)
institution	DOAJ
collection	DOAJ
language	FA
topic	fully circumferential crack (internal and external) stress intensity factor composite patch repair the finite element cylindrical pipe Bridge engineering TG1-470 Building construction TH1-9745
spellingShingle	fully circumferential crack (internal and external) stress intensity factor composite patch repair the finite element cylindrical pipe Bridge engineering TG1-470 Building construction TH1-9745 Seyed Mehdi Nabavi Amin Pourabdol Majid Jamal-Omidi Numerical study of the effect of the composite patches on the stress intensity factors for a circumferential fully crack in pipes
description	The purpose of this paper is to reinforce the pressurized pipe containing a fully circumferential crack (internal and external) using composite patches due to their remarkable properties. In the research procedure, in order to validate the proposed models, firstly, a cylindrical pipe with a circumferential crack subjected to the uniform tension was modeled and the results of stress intensity factors were compared with an existing paper. Then, in order to examine the modeling process of composite patch and adhesive, a damaged plate with a central crack was considered and the results of stress intensity factors were investigated and evaluated. Stress intensity factor at the crack tip was calculated using the J-integral. In this regard, using the 3D finite element method, the stress intensity factors in the crack before and after the pipe repair were evaluated with boron/epoxy, carbon/epoxy and glass/epoxy composite patches. The crack geometries correspond to different relative depths from 0.4 to 0.8. The results showed that the use of composite patches significantly decreased the stress intensity factors, and this reduction in the external circumferential cracks is more than the internal ones. Also, in the research process, the effect of the patch thickness, the angle of the fiber and the adhesive material on the stress intensity factors has been investigated.
format	article
author	Seyed Mehdi Nabavi Amin Pourabdol Majid Jamal-Omidi
author_facet	Seyed Mehdi Nabavi Amin Pourabdol Majid Jamal-Omidi
author_sort	Seyed Mehdi Nabavi
title	Numerical study of the effect of the composite patches on the stress intensity factors for a circumferential fully crack in pipes
title_short	Numerical study of the effect of the composite patches on the stress intensity factors for a circumferential fully crack in pipes
title_full	Numerical study of the effect of the composite patches on the stress intensity factors for a circumferential fully crack in pipes
title_fullStr	Numerical study of the effect of the composite patches on the stress intensity factors for a circumferential fully crack in pipes
title_full_unstemmed	Numerical study of the effect of the composite patches on the stress intensity factors for a circumferential fully crack in pipes
title_sort	numerical study of the effect of the composite patches on the stress intensity factors for a circumferential fully crack in pipes
publisher	Iranian Society of Structrual Engineering (ISSE)
publishDate	2020
url	https://doaj.org/article/3c3a11e0a4764256889595ea145463b1
work_keys_str_mv	AT seyedmehdinabavi numericalstudyoftheeffectofthecompositepatchesonthestressintensityfactorsforacircumferentialfullycrackinpipes AT aminpourabdol numericalstudyoftheeffectofthecompositepatchesonthestressintensityfactorsforacircumferentialfullycrackinpipes AT majidjamalomidi numericalstudyoftheeffectofthecompositepatchesonthestressintensityfactorsforacircumferentialfullycrackinpipes
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Numerical study of the effect of the composite patches on the stress intensity factors for a circumferential fully crack in pipes

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