$Ductile and brittle behavior during deformation and fracture for pure ice detected by quasi-static indentation test$
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Ductile and brittle behavior during deformation and fracture for pure ice detected by quasi-static indentation test

Ductile and brittle behavior during deformation and fracture for ice have attracted considerable research interest. The strength of ice has been reported to depend on the temperature, strain rate, and other factors. In addition, the tip shape of an object that comes into contact with ice is one of t...

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Autores principales:	Yuki NAKAO, Hiroyuki YAMADA, Nagahisa OGASAWARA, Takatoshi MATSUZAWA
Formato:	article
Lenguaje:	EN
Publicado:	The Japan Society of Mechanical Engineers 2021
Materias:	ice fracture indentation quasi-static strain rate dependence Mechanical engineering and machinery TJ1-1570
Acceso en línea:	https://doaj.org/article/78253277828340408ffc15f3c88f10a5
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spelling	oai:doaj.org-article:78253277828340408ffc15f3c88f10a52021-11-29T06:07:02ZDuctile and brittle behavior during deformation and fracture for pure ice detected by quasi-static indentation test2187-974510.1299/mej.21-00083https://doaj.org/article/78253277828340408ffc15f3c88f10a52021-04-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/mej/8/3/8_21-00083/_pdf/-char/enhttps://doaj.org/toc/2187-9745Ductile and brittle behavior during deformation and fracture for ice have attracted considerable research interest. The strength of ice has been reported to depend on the temperature, strain rate, and other factors. In addition, the tip shape of an object that comes into contact with ice is one of the important factors which influence the fracture phenomenon of ice. However, the associated fracture mechanisms have not been clarified. Therefore, in this study, a quasi-static indentation test was performed to investigate the deformation and fracture properties of pure ice. The displacement rate ranged from 0.002 to 2 mm/s, and the test temperature was approximately -10℃. Conical indenters with indenter angles (apex angles) of 90, 120, and 140° and spherical indenters with diameters of 10, 15, and 20 mm were used. In the case of the conical indenters, the maximum load at effective strain rates of 10-1 and 100 s-1 increased owing to the temporary stagnation of the cracks, caused by the negative rate dependence of the ice strength. In contrast, in the case of the spherical indenters, the maximum load at effective strain rates from 10-4 to 10-1 s-1 exhibited a trend similar to that in the uniaxial compression test: specifically, the maximum load peaked at 10-3 s-1 and then decreased with further increase in the strain rates. Furthermore, the contact radius when the ice fractured did not change considerably for different indenter shapes. This finding indicated that the internal deformation distribution caused by the indentation considerably influenced the deformation and fracture properties of ice. A larger indenter angle or diameter of the conical or spherical indenters, respectively, corresponded to a larger internal deformation distribution and a smaller displacement pertaining to the fracture.Yuki NAKAOHiroyuki YAMADANagahisa OGASAWARATakatoshi MATSUZAWAThe Japan Society of Mechanical Engineersarticleicefractureindentationquasi-staticstrain rate dependenceMechanical engineering and machineryTJ1-1570ENMechanical Engineering Journal, Vol 8, Iss 3, Pp 21-00083-21-00083 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	ice fracture indentation quasi-static strain rate dependence Mechanical engineering and machinery TJ1-1570
spellingShingle	ice fracture indentation quasi-static strain rate dependence Mechanical engineering and machinery TJ1-1570 Yuki NAKAO Hiroyuki YAMADA Nagahisa OGASAWARA Takatoshi MATSUZAWA Ductile and brittle behavior during deformation and fracture for pure ice detected by quasi-static indentation test
description	Ductile and brittle behavior during deformation and fracture for ice have attracted considerable research interest. The strength of ice has been reported to depend on the temperature, strain rate, and other factors. In addition, the tip shape of an object that comes into contact with ice is one of the important factors which influence the fracture phenomenon of ice. However, the associated fracture mechanisms have not been clarified. Therefore, in this study, a quasi-static indentation test was performed to investigate the deformation and fracture properties of pure ice. The displacement rate ranged from 0.002 to 2 mm/s, and the test temperature was approximately -10℃. Conical indenters with indenter angles (apex angles) of 90, 120, and 140° and spherical indenters with diameters of 10, 15, and 20 mm were used. In the case of the conical indenters, the maximum load at effective strain rates of 10-1 and 100 s-1 increased owing to the temporary stagnation of the cracks, caused by the negative rate dependence of the ice strength. In contrast, in the case of the spherical indenters, the maximum load at effective strain rates from 10-4 to 10-1 s-1 exhibited a trend similar to that in the uniaxial compression test: specifically, the maximum load peaked at 10-3 s-1 and then decreased with further increase in the strain rates. Furthermore, the contact radius when the ice fractured did not change considerably for different indenter shapes. This finding indicated that the internal deformation distribution caused by the indentation considerably influenced the deformation and fracture properties of ice. A larger indenter angle or diameter of the conical or spherical indenters, respectively, corresponded to a larger internal deformation distribution and a smaller displacement pertaining to the fracture.
format	article
author	Yuki NAKAO Hiroyuki YAMADA Nagahisa OGASAWARA Takatoshi MATSUZAWA
author_facet	Yuki NAKAO Hiroyuki YAMADA Nagahisa OGASAWARA Takatoshi MATSUZAWA
author_sort	Yuki NAKAO
title	Ductile and brittle behavior during deformation and fracture for pure ice detected by quasi-static indentation test
title_short	Ductile and brittle behavior during deformation and fracture for pure ice detected by quasi-static indentation test
title_full	Ductile and brittle behavior during deformation and fracture for pure ice detected by quasi-static indentation test
title_fullStr	Ductile and brittle behavior during deformation and fracture for pure ice detected by quasi-static indentation test
title_full_unstemmed	Ductile and brittle behavior during deformation and fracture for pure ice detected by quasi-static indentation test
title_sort	ductile and brittle behavior during deformation and fracture for pure ice detected by quasi-static indentation test
publisher	The Japan Society of Mechanical Engineers
publishDate	2021
url	https://doaj.org/article/78253277828340408ffc15f3c88f10a5
work_keys_str_mv	AT yukinakao ductileandbrittlebehaviorduringdeformationandfractureforpureicedetectedbyquasistaticindentationtest AT hiroyukiyamada ductileandbrittlebehaviorduringdeformationandfractureforpureicedetectedbyquasistaticindentationtest AT nagahisaogasawara ductileandbrittlebehaviorduringdeformationandfractureforpureicedetectedbyquasistaticindentationtest AT takatoshimatsuzawa ductileandbrittlebehaviorduringdeformationandfractureforpureicedetectedbyquasistaticindentationtest
_version_	1718407594122412032

Ductile and brittle behavior during deformation and fracture for pure ice detected by quasi-static indentation test

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