$Brittle failure criteria of CNRB specimen for fracture toughness test$
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Brittle failure criteria of CNRB specimen for fracture toughness test

This paper proposes a technique to determine the dimensions of a CNRB specimen to be used for plane fracture toughness tests. First, the brittle fracture behavior satisfying the small-scale yielding condition is investigated through an elasto-plastic analysis. The analysis parameters are the shape p...

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Autores principales:	Manato KANESAKI, Kiyotaka OBUNAI, Tadao FUKUTA, Yoshihito KUROSHIMA, Koichi OZAKI
Formato:	article
Lenguaje:	EN
Publicado:	The Japan Society of Mechanical Engineers 2020
Materias:	fracture toughness j integral fem small-scale yielding conditions Mechanical engineering and machinery TJ1-1570
Acceso en línea:	https://doaj.org/article/cf7366808ac14e5ab50528f88da5b978
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spelling	oai:doaj.org-article:cf7366808ac14e5ab50528f88da5b9782021-11-29T05:59:26ZBrittle failure criteria of CNRB specimen for fracture toughness test2187-974510.1299/mej.19-00621https://doaj.org/article/cf7366808ac14e5ab50528f88da5b9782020-05-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/mej/7/4/7_19-00621/_pdf/-char/enhttps://doaj.org/toc/2187-9745This paper proposes a technique to determine the dimensions of a CNRB specimen to be used for plane fracture toughness tests. First, the brittle fracture behavior satisfying the small-scale yielding condition is investigated through an elasto-plastic analysis. The analysis parameters are the shape parameters such as the notch ratio of the specimen based on the parallel part diameter and notch bottom diameter; tip radius; and notch angle. Based on the analysis results obtained, a fracture toughness test is conducted on a JIS-S45C (quenched and tempered) specimen to evaluate the small-scale yielding condition. The experimental results confirm a linear relationship between the square of the value obtained by dividing the plane-strain fracture toughness by the yield stress and specimen diameter. Further, the diameter of the CNRB specimen satisfying the small-scale yielding condition varies with the shape parameters. With these results, a function that can determine the CNRB specimen diameter at which brittle failure occurs under uniaxial tensile loading is proposed and validated.Manato KANESAKIKiyotaka OBUNAITadao FUKUTAYoshihito KUROSHIMAKoichi OZAKIThe Japan Society of Mechanical Engineersarticlefracture toughnessj integralfemsmall-scale yielding conditionsMechanical engineering and machineryTJ1-1570ENMechanical Engineering Journal, Vol 7, Iss 4, Pp 19-00621-19-00621 (2020)
institution	DOAJ
collection	DOAJ
language	EN
topic	fracture toughness j integral fem small-scale yielding conditions Mechanical engineering and machinery TJ1-1570
spellingShingle	fracture toughness j integral fem small-scale yielding conditions Mechanical engineering and machinery TJ1-1570 Manato KANESAKI Kiyotaka OBUNAI Tadao FUKUTA Yoshihito KUROSHIMA Koichi OZAKI Brittle failure criteria of CNRB specimen for fracture toughness test
description	This paper proposes a technique to determine the dimensions of a CNRB specimen to be used for plane fracture toughness tests. First, the brittle fracture behavior satisfying the small-scale yielding condition is investigated through an elasto-plastic analysis. The analysis parameters are the shape parameters such as the notch ratio of the specimen based on the parallel part diameter and notch bottom diameter; tip radius; and notch angle. Based on the analysis results obtained, a fracture toughness test is conducted on a JIS-S45C (quenched and tempered) specimen to evaluate the small-scale yielding condition. The experimental results confirm a linear relationship between the square of the value obtained by dividing the plane-strain fracture toughness by the yield stress and specimen diameter. Further, the diameter of the CNRB specimen satisfying the small-scale yielding condition varies with the shape parameters. With these results, a function that can determine the CNRB specimen diameter at which brittle failure occurs under uniaxial tensile loading is proposed and validated.
format	article
author	Manato KANESAKI Kiyotaka OBUNAI Tadao FUKUTA Yoshihito KUROSHIMA Koichi OZAKI
author_facet	Manato KANESAKI Kiyotaka OBUNAI Tadao FUKUTA Yoshihito KUROSHIMA Koichi OZAKI
author_sort	Manato KANESAKI
title	Brittle failure criteria of CNRB specimen for fracture toughness test
title_short	Brittle failure criteria of CNRB specimen for fracture toughness test
title_full	Brittle failure criteria of CNRB specimen for fracture toughness test
title_fullStr	Brittle failure criteria of CNRB specimen for fracture toughness test
title_full_unstemmed	Brittle failure criteria of CNRB specimen for fracture toughness test
title_sort	brittle failure criteria of cnrb specimen for fracture toughness test
publisher	The Japan Society of Mechanical Engineers
publishDate	2020
url	https://doaj.org/article/cf7366808ac14e5ab50528f88da5b978
work_keys_str_mv	AT manatokanesaki brittlefailurecriteriaofcnrbspecimenforfracturetoughnesstest AT kiyotakaobunai brittlefailurecriteriaofcnrbspecimenforfracturetoughnesstest AT tadaofukuta brittlefailurecriteriaofcnrbspecimenforfracturetoughnesstest AT yoshihitokuroshima brittlefailurecriteriaofcnrbspecimenforfracturetoughnesstest AT koichiozaki brittlefailurecriteriaofcnrbspecimenforfracturetoughnesstest
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Brittle failure criteria of CNRB specimen for fracture toughness test

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