Measurement of plasma for elucidation of crater formation mechanism on aluminum foam under high speed impact

It has been reported that when a high-speed projectile collides with aluminum foam, a unique crater with a narrow entrance and large cavity is formed, shaped like a turnip. In the case of a material with higher porosity, it is considered that a debris cloud is produced by the impact, and the crater...

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Autores principales:	Takanari SAKAI, Koki UMEDA, Keiko WATANABE
Formato:	article
Lenguaje:	EN
Publicado:	The Japan Society of Mechanical Engineers 2016
Materias:	high-speed impact plasma triple probe method temperature aluminum foam crater Mechanical engineering and machinery TJ1-1570
Acceso en línea:	https://doaj.org/article/a9143eee2545432787156fbfd1532ba2
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spelling	oai:doaj.org-article:a9143eee2545432787156fbfd1532ba22021-11-26T06:58:32ZMeasurement of plasma for elucidation of crater formation mechanism on aluminum foam under high speed impact2187-974510.1299/mej.16-00272https://doaj.org/article/a9143eee2545432787156fbfd1532ba22016-10-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/mej/3/6/3_16-00272/_pdf/-char/enhttps://doaj.org/toc/2187-9745It has been reported that when a high-speed projectile collides with aluminum foam, a unique crater with a narrow entrance and large cavity is formed, shaped like a turnip. In the case of a material with higher porosity, it is considered that a debris cloud is produced by the impact, and the crater is created by scattering the debris cloud inside of the target material. In addition, melting traces have been observed, and it is predicted that these are caused by the heat created by the impact. It is conceivable that the temperature of a plasma induced by high-speed impact is associated to indicate the temperature at impact, although this relationship has not yet been proven. Measuring temperature at impact point is difficult since the measuring device will have to avoid collision with the projectile. Therefore, it is essential to measure plasma apart from impact point and observe diffusion of plasma. In this paper, high-speed impact experiments in which plasma was measured with a triple probe and a high-speed camera was performed to confirm the above. The high-speed impact experiment was performed with a vertical gas gun at Ritsumeikan University's Impact Engineering Laboratory. The impact speed was 400 m/s, and the target material was A5052. The high-speed camera had a maximum frame rate of 1.4 Mfps and a minimum exposure time of 1.0 μs. Plasma signals were measured by the triple probe method, and at the moment of impact, the flash was recorded by the high-speed camera.Takanari SAKAIKoki UMEDAKeiko WATANABEThe Japan Society of Mechanical Engineersarticlehigh-speed impactplasmatriple probe methodtemperaturealuminum foamcraterMechanical engineering and machineryTJ1-1570ENMechanical Engineering Journal, Vol 3, Iss 6, Pp 16-00272-16-00272 (2016)
institution	DOAJ
collection	DOAJ
language	EN
topic	high-speed impact plasma triple probe method temperature aluminum foam crater Mechanical engineering and machinery TJ1-1570
spellingShingle	high-speed impact plasma triple probe method temperature aluminum foam crater Mechanical engineering and machinery TJ1-1570 Takanari SAKAI Koki UMEDA Keiko WATANABE Measurement of plasma for elucidation of crater formation mechanism on aluminum foam under high speed impact
description	It has been reported that when a high-speed projectile collides with aluminum foam, a unique crater with a narrow entrance and large cavity is formed, shaped like a turnip. In the case of a material with higher porosity, it is considered that a debris cloud is produced by the impact, and the crater is created by scattering the debris cloud inside of the target material. In addition, melting traces have been observed, and it is predicted that these are caused by the heat created by the impact. It is conceivable that the temperature of a plasma induced by high-speed impact is associated to indicate the temperature at impact, although this relationship has not yet been proven. Measuring temperature at impact point is difficult since the measuring device will have to avoid collision with the projectile. Therefore, it is essential to measure plasma apart from impact point and observe diffusion of plasma. In this paper, high-speed impact experiments in which plasma was measured with a triple probe and a high-speed camera was performed to confirm the above. The high-speed impact experiment was performed with a vertical gas gun at Ritsumeikan University's Impact Engineering Laboratory. The impact speed was 400 m/s, and the target material was A5052. The high-speed camera had a maximum frame rate of 1.4 Mfps and a minimum exposure time of 1.0 μs. Plasma signals were measured by the triple probe method, and at the moment of impact, the flash was recorded by the high-speed camera.
format	article
author	Takanari SAKAI Koki UMEDA Keiko WATANABE
author_facet	Takanari SAKAI Koki UMEDA Keiko WATANABE
author_sort	Takanari SAKAI
title	Measurement of plasma for elucidation of crater formation mechanism on aluminum foam under high speed impact
title_short	Measurement of plasma for elucidation of crater formation mechanism on aluminum foam under high speed impact
title_full	Measurement of plasma for elucidation of crater formation mechanism on aluminum foam under high speed impact
title_fullStr	Measurement of plasma for elucidation of crater formation mechanism on aluminum foam under high speed impact
title_full_unstemmed	Measurement of plasma for elucidation of crater formation mechanism on aluminum foam under high speed impact
title_sort	measurement of plasma for elucidation of crater formation mechanism on aluminum foam under high speed impact
publisher	The Japan Society of Mechanical Engineers
publishDate	2016
url	https://doaj.org/article/a9143eee2545432787156fbfd1532ba2
work_keys_str_mv	AT takanarisakai measurementofplasmaforelucidationofcraterformationmechanismonaluminumfoamunderhighspeedimpact AT kokiumeda measurementofplasmaforelucidationofcraterformationmechanismonaluminumfoamunderhighspeedimpact AT keikowatanabe measurementofplasmaforelucidationofcraterformationmechanismonaluminumfoamunderhighspeedimpact
_version_	1718409738752884736

Measurement of plasma for elucidation of crater formation mechanism on aluminum foam under high speed impact

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