3-D constraint effects on fracture mechanics specimens

Detalhes bibliográficos
Autor(a) principal: RABELLO, E.G.
Data de Publicação: 2014
Outros Autores: MATTAR NETO, M., CRUZ, J.R.B., GOMES, P.T.V., INTERNATIONAL CONGRESS OF MECHANICAL ENGINEERING, 18th
Tipo de documento: Artigo de conferência
Título da fonte: Repositório Institucional do IPEN
Texto Completo: http://repositorio.ipen.br/handle/123456789/18333
Resumo: The constraint is accepted as a measure of the triaxiality level at the crack-tip. Specimens with different a/W ratios present variation on the stress field ahead of the crack-tip. A stress relaxation can occur depending on the a/W values which is known as loss of constraint and has strong influence on the structural steels fracture toughness. Different approaches have been proposed to quantify constraint and to describe the effects of constraint variations on engineering fracture toughness characterized by J-integral, or equivalently the crack-tip opening displacement, CTOD. This paper presents the results of a numerical investigation, in which single-edge cracked bars in three point bend SE(B) and compact tension C(T) specimens, with different relative crack lengths, were systematically studied via detailed three-dimensional finite element analyses. A new parameter is then proposed to quantify crack-tip constraint.
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spelling 2014-11-17T18:45:50Z2014-11-18T18:51:32Z2015-04-02T03:06:44Z2014-11-17T18:45:50Z2014-11-18T18:51:32Z2015-04-02T03:06:44ZNovember 6-11, 2005http://repositorio.ipen.br/handle/123456789/18333The constraint is accepted as a measure of the triaxiality level at the crack-tip. Specimens with different a/W ratios present variation on the stress field ahead of the crack-tip. A stress relaxation can occur depending on the a/W values which is known as loss of constraint and has strong influence on the structural steels fracture toughness. Different approaches have been proposed to quantify constraint and to describe the effects of constraint variations on engineering fracture toughness characterized by J-integral, or equivalently the crack-tip opening displacement, CTOD. This paper presents the results of a numerical investigation, in which single-edge cracked bars in three point bend SE(B) and compact tension C(T) specimens, with different relative crack lengths, were systematically studied via detailed three-dimensional finite element analyses. A new parameter is then proposed to quantify crack-tip constraint.Made available in DSpace on 2014-11-17T18:45:50Z (GMT). No. of bitstreams: 0Made available in DSpace on 2014-11-18T18:51:32Z (GMT). No. of bitstreams: 1 11048.pdf: 828403 bytes, checksum: b710cd4fa386050d82f48118f5551c7a (MD5)Made available in DSpace on 2015-04-02T03:06:44Z (GMT). No. of bitstreams: 1 11048.pdf: 828403 bytes, checksum: b710cd4fa386050d82f48118f5551c7a (MD5)fracture mechanicsintegralscracksstress intensity factorsfinite element methodthree-dimensional calculations3-D constraint effects on fracture mechanics specimensinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObjectCOBEMIOuro Preto, MGRABELLO, E.G.MATTAR NETO, M.CRUZ, J.R.B.GOMES, P.T.V.INTERNATIONAL CONGRESS OF MECHANICAL ENGINEERING, 18thinfo:eu-repo/semantics/openAccessreponame:Repositório Institucional do IPENinstname:Instituto de Pesquisas Energéticas e Nucleares (IPEN)instacron:IPEN110482005MATTAR NETO, M.66-66Proceedings29437017293117RABELLO, E.G.:2943:21:SMATTAR NETO, M.:70:21:NCRUZ, J.R.B.:1729:-1:NGOMES, P.T.V.:3117:21:NORIGINAL11048.pdfapplication/pdf828403http://repositorio.ipen.br/bitstream/123456789/18333/1/11048.pdfb710cd4fa386050d82f48118f5551c7aMD51123456789/183332022-04-29 12:38:41.11oai:repositorio.ipen.br:123456789/18333Repositório InstitucionalPUBhttp://repositorio.ipen.br/oai/requestbibl@ipen.bropendoar:45102022-04-29T12:38:41Repositório Institucional do IPEN - Instituto de Pesquisas Energéticas e Nucleares (IPEN)false
dc.title.pt_BR.fl_str_mv 3-D constraint effects on fracture mechanics specimens
title 3-D constraint effects on fracture mechanics specimens
spellingShingle 3-D constraint effects on fracture mechanics specimens
RABELLO, E.G.
fracture mechanics
integrals
cracks
stress intensity factors
finite element method
three-dimensional calculations
title_short 3-D constraint effects on fracture mechanics specimens
title_full 3-D constraint effects on fracture mechanics specimens
title_fullStr 3-D constraint effects on fracture mechanics specimens
title_full_unstemmed 3-D constraint effects on fracture mechanics specimens
title_sort 3-D constraint effects on fracture mechanics specimens
author RABELLO, E.G.
author_facet RABELLO, E.G.
MATTAR NETO, M.
CRUZ, J.R.B.
GOMES, P.T.V.
INTERNATIONAL CONGRESS OF MECHANICAL ENGINEERING, 18th
author_role author
author2 MATTAR NETO, M.
CRUZ, J.R.B.
GOMES, P.T.V.
INTERNATIONAL CONGRESS OF MECHANICAL ENGINEERING, 18th
author2_role author
author
author
author
dc.contributor.author.fl_str_mv RABELLO, E.G.
MATTAR NETO, M.
CRUZ, J.R.B.
GOMES, P.T.V.
INTERNATIONAL CONGRESS OF MECHANICAL ENGINEERING, 18th
dc.subject.por.fl_str_mv fracture mechanics
integrals
cracks
stress intensity factors
finite element method
three-dimensional calculations
topic fracture mechanics
integrals
cracks
stress intensity factors
finite element method
three-dimensional calculations
description The constraint is accepted as a measure of the triaxiality level at the crack-tip. Specimens with different a/W ratios present variation on the stress field ahead of the crack-tip. A stress relaxation can occur depending on the a/W values which is known as loss of constraint and has strong influence on the structural steels fracture toughness. Different approaches have been proposed to quantify constraint and to describe the effects of constraint variations on engineering fracture toughness characterized by J-integral, or equivalently the crack-tip opening displacement, CTOD. This paper presents the results of a numerical investigation, in which single-edge cracked bars in three point bend SE(B) and compact tension C(T) specimens, with different relative crack lengths, were systematically studied via detailed three-dimensional finite element analyses. A new parameter is then proposed to quantify crack-tip constraint.
publishDate 2014
dc.date.evento.pt_BR.fl_str_mv November 6-11, 2005
dc.date.accessioned.fl_str_mv 2014-11-17T18:45:50Z
2014-11-18T18:51:32Z
2015-04-02T03:06:44Z
dc.date.available.fl_str_mv 2014-11-17T18:45:50Z
2014-11-18T18:51:32Z
2015-04-02T03:06:44Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
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