Measurement of strain distribution in metals for tensile test using digital image correlation method and consideration of stress-strain relation

Displacement distribution in plate specimen of aluminum during tensile test was measured with digital image correlation method and strain distribution was derived based on the displacement distribution. Change of strain distribution was obtained during whole tensile test. Local concentrated strain s...

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Autor principal:	Akira KATO
Formato:	article
Lenguaje:	EN
Publicado:	The Japan Society of Mechanical Engineers 2016
Materias:	experimental mechanics displacement measurement digital image correlation local deformation stress-strain relation Mechanical engineering and machinery TJ1-1570
Acceso en línea:	https://doaj.org/article/1c586602cc534f4190250e60ae38fdb9
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spelling	oai:doaj.org-article:1c586602cc534f4190250e60ae38fdb92021-11-26T06:58:32ZMeasurement of strain distribution in metals for tensile test using digital image correlation method and consideration of stress-strain relation2187-974510.1299/mej.16-00141https://doaj.org/article/1c586602cc534f4190250e60ae38fdb92016-08-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/mej/3/6/3_16-00141/_pdf/-char/enhttps://doaj.org/toc/2187-9745Displacement distribution in plate specimen of aluminum during tensile test was measured with digital image correlation method and strain distribution was derived based on the displacement distribution. Change of strain distribution was obtained during whole tensile test. Local concentrated strain starts to appear before proof stress and the local strain becomes larger as the deformation proceeds and strain at other area in the specimen almost does not change. In consideration of stress-strain relation, true stress derived from the conventional average stress in uniform area of the specimen decreases after proof stress with increase of true strain. True stress derived from the maximum strain in specimen increases with increase of true strain and it is found that work hardening exists. Stress-strain relation for aluminum was compared with the result for steel which the author already published. It was found that we have to measure strain distribution and consider local maximum strain to evaluate stress-strain relation accurately.Akira KATOThe Japan Society of Mechanical Engineersarticleexperimental mechanicsdisplacement measurementdigital image correlationlocal deformationstress-strain relationMechanical engineering and machineryTJ1-1570ENMechanical Engineering Journal, Vol 3, Iss 6, Pp 16-00141-16-00141 (2016)
institution	DOAJ
collection	DOAJ
language	EN
topic	experimental mechanics displacement measurement digital image correlation local deformation stress-strain relation Mechanical engineering and machinery TJ1-1570
spellingShingle	experimental mechanics displacement measurement digital image correlation local deformation stress-strain relation Mechanical engineering and machinery TJ1-1570 Akira KATO Measurement of strain distribution in metals for tensile test using digital image correlation method and consideration of stress-strain relation
description	Displacement distribution in plate specimen of aluminum during tensile test was measured with digital image correlation method and strain distribution was derived based on the displacement distribution. Change of strain distribution was obtained during whole tensile test. Local concentrated strain starts to appear before proof stress and the local strain becomes larger as the deformation proceeds and strain at other area in the specimen almost does not change. In consideration of stress-strain relation, true stress derived from the conventional average stress in uniform area of the specimen decreases after proof stress with increase of true strain. True stress derived from the maximum strain in specimen increases with increase of true strain and it is found that work hardening exists. Stress-strain relation for aluminum was compared with the result for steel which the author already published. It was found that we have to measure strain distribution and consider local maximum strain to evaluate stress-strain relation accurately.
format	article
author	Akira KATO
author_facet	Akira KATO
author_sort	Akira KATO
title	Measurement of strain distribution in metals for tensile test using digital image correlation method and consideration of stress-strain relation
title_short	Measurement of strain distribution in metals for tensile test using digital image correlation method and consideration of stress-strain relation
title_full	Measurement of strain distribution in metals for tensile test using digital image correlation method and consideration of stress-strain relation
title_fullStr	Measurement of strain distribution in metals for tensile test using digital image correlation method and consideration of stress-strain relation
title_full_unstemmed	Measurement of strain distribution in metals for tensile test using digital image correlation method and consideration of stress-strain relation
title_sort	measurement of strain distribution in metals for tensile test using digital image correlation method and consideration of stress-strain relation
publisher	The Japan Society of Mechanical Engineers
publishDate	2016
url	https://doaj.org/article/1c586602cc534f4190250e60ae38fdb9
work_keys_str_mv	AT akirakato measurementofstraindistributioninmetalsfortensiletestusingdigitalimagecorrelationmethodandconsiderationofstressstrainrelation
_version_	1718409704050262016

Measurement of strain distribution in metals for tensile test using digital image correlation method and consideration of stress-strain relation

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