Plateau stress estimation of impact compression test on aluminum foam using X-ray computed tomography observation

The plateau stress of aluminum (Al) foam is an important mechanical parameter that is closely related to its energy absorptivity. An estimation method for plateau stress was proposed by simply assuming that when the mean true compressive stress on a maximum-porosity cross section perpendicular to th...

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Autores principales:	Takao UTSUNOMIYA, Yoshihiko HANGAI, Naoyuki KUBOTA, Osamu KUWAZURU, Nobuhiro YOSHIKAWA
Formato:	article
Lenguaje:	EN
Publicado:	The Japan Society of Mechanical Engineers 2016
Materias:	porous material friction joint ductile fracture material testing plateau stress compression test porosity Mechanical engineering and machinery TJ1-1570
Acceso en línea:	https://doaj.org/article/fd63776ea4ef42e89ee9ce0b45fce6d3
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spelling	oai:doaj.org-article:fd63776ea4ef42e89ee9ce0b45fce6d32021-11-26T06:58:32ZPlateau stress estimation of impact compression test on aluminum foam using X-ray computed tomography observation2187-974510.1299/mej.16-00149https://doaj.org/article/fd63776ea4ef42e89ee9ce0b45fce6d32016-10-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/mej/3/6/3_16-00149/_pdf/-char/enhttps://doaj.org/toc/2187-9745The plateau stress of aluminum (Al) foam is an important mechanical parameter that is closely related to its energy absorptivity. An estimation method for plateau stress was proposed by simply assuming that when the mean true compressive stress on a maximum-porosity cross section perpendicular to the direction of compressive loading reaches the critical value, the nominal compressive stress becomes equal to the plateau stress. In this study, using commercial-purity A1050 Al, A6061 Al alloy and ADC12 Al alloy die castings containing a large amount of gases, uniform Al foam and two types of functionally graded (FG) Al foam were fabricated by the friction stir welding (FSW) route precursor process. The local porosity distributions for the fabricated Al foams were obtained from the observation of X-ray computed tomography (CT) images, then drop weight impact tests were carried out to evaluate the plateau stresses. Through the comparison of the test results with the results obtained by the estimation method, the applicability of the estimation method for plateau stress to impact compression tests on uniform aluminum Al foam and each foam layer of FG Al foam was examined. It was shown that the plateau stresses can be evaluated approximately within ±20% error when the proof stress is employed as the critical value.Takao UTSUNOMIYAYoshihiko HANGAINaoyuki KUBOTAOsamu KUWAZURUNobuhiro YOSHIKAWAThe Japan Society of Mechanical Engineersarticleporous materialfriction jointductile fracturematerial testingplateau stresscompression testporosityMechanical engineering and machineryTJ1-1570ENMechanical Engineering Journal, Vol 3, Iss 6, Pp 16-00149-16-00149 (2016)
institution	DOAJ
collection	DOAJ
language	EN
topic	porous material friction joint ductile fracture material testing plateau stress compression test porosity Mechanical engineering and machinery TJ1-1570
spellingShingle	porous material friction joint ductile fracture material testing plateau stress compression test porosity Mechanical engineering and machinery TJ1-1570 Takao UTSUNOMIYA Yoshihiko HANGAI Naoyuki KUBOTA Osamu KUWAZURU Nobuhiro YOSHIKAWA Plateau stress estimation of impact compression test on aluminum foam using X-ray computed tomography observation
description	The plateau stress of aluminum (Al) foam is an important mechanical parameter that is closely related to its energy absorptivity. An estimation method for plateau stress was proposed by simply assuming that when the mean true compressive stress on a maximum-porosity cross section perpendicular to the direction of compressive loading reaches the critical value, the nominal compressive stress becomes equal to the plateau stress. In this study, using commercial-purity A1050 Al, A6061 Al alloy and ADC12 Al alloy die castings containing a large amount of gases, uniform Al foam and two types of functionally graded (FG) Al foam were fabricated by the friction stir welding (FSW) route precursor process. The local porosity distributions for the fabricated Al foams were obtained from the observation of X-ray computed tomography (CT) images, then drop weight impact tests were carried out to evaluate the plateau stresses. Through the comparison of the test results with the results obtained by the estimation method, the applicability of the estimation method for plateau stress to impact compression tests on uniform aluminum Al foam and each foam layer of FG Al foam was examined. It was shown that the plateau stresses can be evaluated approximately within ±20% error when the proof stress is employed as the critical value.
format	article
author	Takao UTSUNOMIYA Yoshihiko HANGAI Naoyuki KUBOTA Osamu KUWAZURU Nobuhiro YOSHIKAWA
author_facet	Takao UTSUNOMIYA Yoshihiko HANGAI Naoyuki KUBOTA Osamu KUWAZURU Nobuhiro YOSHIKAWA
author_sort	Takao UTSUNOMIYA
title	Plateau stress estimation of impact compression test on aluminum foam using X-ray computed tomography observation
title_short	Plateau stress estimation of impact compression test on aluminum foam using X-ray computed tomography observation
title_full	Plateau stress estimation of impact compression test on aluminum foam using X-ray computed tomography observation
title_fullStr	Plateau stress estimation of impact compression test on aluminum foam using X-ray computed tomography observation
title_full_unstemmed	Plateau stress estimation of impact compression test on aluminum foam using X-ray computed tomography observation
title_sort	plateau stress estimation of impact compression test on aluminum foam using x-ray computed tomography observation
publisher	The Japan Society of Mechanical Engineers
publishDate	2016
url	https://doaj.org/article/fd63776ea4ef42e89ee9ce0b45fce6d3
work_keys_str_mv	AT takaoutsunomiya plateaustressestimationofimpactcompressiontestonaluminumfoamusingxraycomputedtomographyobservation AT yoshihikohangai plateaustressestimationofimpactcompressiontestonaluminumfoamusingxraycomputedtomographyobservation AT naoyukikubota plateaustressestimationofimpactcompressiontestonaluminumfoamusingxraycomputedtomographyobservation AT osamukuwazuru plateaustressestimationofimpactcompressiontestonaluminumfoamusingxraycomputedtomographyobservation AT nobuhiroyoshikawa plateaustressestimationofimpactcompressiontestonaluminumfoamusingxraycomputedtomographyobservation
_version_	1718409757628301312

Plateau stress estimation of impact compression test on aluminum foam using X-ray computed tomography observation

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