Static experiment on rapid crack bifurcation with Y-shaped and parallel notches

Static experiments related to rapid crack bifurcation are conducted with PMMA plate specimens with Y-shaped notches. The bifurcation angle of the Y-shaped notch is changed from zero to 45 degrees. Tensile force is applied to the specimen, and a crack arises at one of the two branch notch tips. The c...

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Autores principales:	Shinichi SUZUKI, Yusuke IWASAKI, Yasunobu SHIMIZU, Mohd Azrin BIN YUSOF
Formato:	article
Lenguaje:	EN
Publicado:	The Japan Society of Mechanical Engineers 2016
Materias:	fracture mechanics crack extension stress intensity factor bifurcation crack branching experimental stress analysis caustic method optical measurement Mechanical engineering and machinery TJ1-1570
Acceso en línea:	https://doaj.org/article/0a689480fe674d788fa40d6a963941fb
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spelling	oai:doaj.org-article:0a689480fe674d788fa40d6a963941fb2021-11-26T06:58:32ZStatic experiment on rapid crack bifurcation with Y-shaped and parallel notches2187-974510.1299/mej.16-00541https://doaj.org/article/0a689480fe674d788fa40d6a963941fb2016-11-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/mej/3/6/3_16-00541/_pdf/-char/enhttps://doaj.org/toc/2187-9745Static experiments related to rapid crack bifurcation are conducted with PMMA plate specimens with Y-shaped notches. The bifurcation angle of the Y-shaped notch is changed from zero to 45 degrees. Tensile force is applied to the specimen, and a crack arises at one of the two branch notch tips. The crack propagation angle is measured, which is the angle between the crack and the branch notch. The measurement results say that the crack propagates in the same direction as the branch notch when the bifurcation angle is about 14 degrees. This angle is approximately the same as the bifurcation angle of fast propagating cracks. The crack propagation angle is also measured when the bifurcation angle approaches to zero. The crack propagation angle increases with decreasing the bifurcation angle and approaches 14 degrees as the bifurcation angle tends to zero. The experiments with two parallel notches are also carried out, and the crack propagation angle is measured. The crack propagation angle increases with decreasing the distance between the two parallel notches, and has the maximum value of about 22 degrees. When the distance between the two parallel notches decreases further, the crack propagation angle decreases. But the crack propagation angle does not approach zero but remain finite at 14 degrees as the distance of the two parallel notches tends to zero. These results explain why a crack bifurcates with the bifurcation angle of 14 degrees.Shinichi SUZUKIYusuke IWASAKIYasunobu SHIMIZUMohd Azrin BIN YUSOFThe Japan Society of Mechanical Engineersarticlefracture mechanicscrack extensionstress intensity factorbifurcationcrack branchingexperimental stress analysiscaustic methodoptical measurementMechanical engineering and machineryTJ1-1570ENMechanical Engineering Journal, Vol 3, Iss 6, Pp 16-00541-16-00541 (2016)
institution	DOAJ
collection	DOAJ
language	EN
topic	fracture mechanics crack extension stress intensity factor bifurcation crack branching experimental stress analysis caustic method optical measurement Mechanical engineering and machinery TJ1-1570
spellingShingle	fracture mechanics crack extension stress intensity factor bifurcation crack branching experimental stress analysis caustic method optical measurement Mechanical engineering and machinery TJ1-1570 Shinichi SUZUKI Yusuke IWASAKI Yasunobu SHIMIZU Mohd Azrin BIN YUSOF Static experiment on rapid crack bifurcation with Y-shaped and parallel notches
description	Static experiments related to rapid crack bifurcation are conducted with PMMA plate specimens with Y-shaped notches. The bifurcation angle of the Y-shaped notch is changed from zero to 45 degrees. Tensile force is applied to the specimen, and a crack arises at one of the two branch notch tips. The crack propagation angle is measured, which is the angle between the crack and the branch notch. The measurement results say that the crack propagates in the same direction as the branch notch when the bifurcation angle is about 14 degrees. This angle is approximately the same as the bifurcation angle of fast propagating cracks. The crack propagation angle is also measured when the bifurcation angle approaches to zero. The crack propagation angle increases with decreasing the bifurcation angle and approaches 14 degrees as the bifurcation angle tends to zero. The experiments with two parallel notches are also carried out, and the crack propagation angle is measured. The crack propagation angle increases with decreasing the distance between the two parallel notches, and has the maximum value of about 22 degrees. When the distance between the two parallel notches decreases further, the crack propagation angle decreases. But the crack propagation angle does not approach zero but remain finite at 14 degrees as the distance of the two parallel notches tends to zero. These results explain why a crack bifurcates with the bifurcation angle of 14 degrees.
format	article
author	Shinichi SUZUKI Yusuke IWASAKI Yasunobu SHIMIZU Mohd Azrin BIN YUSOF
author_facet	Shinichi SUZUKI Yusuke IWASAKI Yasunobu SHIMIZU Mohd Azrin BIN YUSOF
author_sort	Shinichi SUZUKI
title	Static experiment on rapid crack bifurcation with Y-shaped and parallel notches
title_short	Static experiment on rapid crack bifurcation with Y-shaped and parallel notches
title_full	Static experiment on rapid crack bifurcation with Y-shaped and parallel notches
title_fullStr	Static experiment on rapid crack bifurcation with Y-shaped and parallel notches
title_full_unstemmed	Static experiment on rapid crack bifurcation with Y-shaped and parallel notches
title_sort	static experiment on rapid crack bifurcation with y-shaped and parallel notches
publisher	The Japan Society of Mechanical Engineers
publishDate	2016
url	https://doaj.org/article/0a689480fe674d788fa40d6a963941fb
work_keys_str_mv	AT shinichisuzuki staticexperimentonrapidcrackbifurcationwithyshapedandparallelnotches AT yusukeiwasaki staticexperimentonrapidcrackbifurcationwithyshapedandparallelnotches AT yasunobushimizu staticexperimentonrapidcrackbifurcationwithyshapedandparallelnotches AT mohdazrinbinyusof staticexperimentonrapidcrackbifurcationwithyshapedandparallelnotches
_version_	1718409699656728576

Static experiment on rapid crack bifurcation with Y-shaped and parallel notches

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