Evaluation of deformation-induced anisotropy for plastically deformed polycarbonate

In the present study, the deformation-induced anisotropic mechanical characteristics and the strain distribution are evaluated from the specimens cut from the necking part of polycarbonate. First, large specimens are used to create deformation-induced anisotropy in the necking part via a uniaxial te...

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Autores principales:	Sho HIGUCHI, Kenichi SAKAUE
Formato:	article
Lenguaje:	EN
Publicado:	The Japan Society of Mechanical Engineers 2021
Materias:	thermoplastic necking deformation-induced anisotropy elasto-plasticity digital image correlation Mechanical engineering and machinery TJ1-1570
Acceso en línea:	https://doaj.org/article/ecc27ef9965d40cf811c327e3de5deed
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id	oai:doaj.org-article:ecc27ef9965d40cf811c327e3de5deed
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spelling	oai:doaj.org-article:ecc27ef9965d40cf811c327e3de5deed2021-11-29T06:07:02ZEvaluation of deformation-induced anisotropy for plastically deformed polycarbonate2187-974510.1299/mej.21-00079https://doaj.org/article/ecc27ef9965d40cf811c327e3de5deed2021-04-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/mej/8/3/8_21-00079/_pdf/-char/enhttps://doaj.org/toc/2187-9745In the present study, the deformation-induced anisotropic mechanical characteristics and the strain distribution are evaluated from the specimens cut from the necking part of polycarbonate. First, large specimens are used to create deformation-induced anisotropy in the necking part via a uniaxial tensile test. Next, the small specimens are cut from the necking parts in an arbitrary direction with respect to the tensile direction of the large specimens. The anisotropic mechanical characteristics in the small specimens are evaluated by a uniaxial tensile test and the strain distribution is measured by the digital image correlation. The result shows that the stress-strain curve of the small specimen depends on the cutting angle to the tensile direction of the large specimens. The elastic modulus and the maximum stress of the small specimens are maximum in the tensile direction of the large specimen, and the elastic modulus and the maximum stress decreases with increasing the cutting angle. Therefore, the deformation-induced anisotropic mechanical characteristics in the necking part are observed. In addition, if the uniaxial tensile direction to the small specimen differs from that to the large specimen, a shear strain band appears in the small specimen and the longitudinal direction of the shear strain band is affected to the tensile direction of the large specimen. The test results indicate that the anisotropic elastic modulus and the anisotropic characteristics in the plastic region are expressed by the anisotropic elastic constitutive equation and the Tsai-Hill criterion, respectively. Moreover, the anisotropic strain hardening is revealed because the Tsai-Hill parameters depends on the plastic strain.Sho HIGUCHIKenichi SAKAUEThe Japan Society of Mechanical Engineersarticlethermoplasticneckingdeformation-induced anisotropyelasto-plasticitydigital image correlationMechanical engineering and machineryTJ1-1570ENMechanical Engineering Journal, Vol 8, Iss 3, Pp 21-00079-21-00079 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	thermoplastic necking deformation-induced anisotropy elasto-plasticity digital image correlation Mechanical engineering and machinery TJ1-1570
spellingShingle	thermoplastic necking deformation-induced anisotropy elasto-plasticity digital image correlation Mechanical engineering and machinery TJ1-1570 Sho HIGUCHI Kenichi SAKAUE Evaluation of deformation-induced anisotropy for plastically deformed polycarbonate
description	In the present study, the deformation-induced anisotropic mechanical characteristics and the strain distribution are evaluated from the specimens cut from the necking part of polycarbonate. First, large specimens are used to create deformation-induced anisotropy in the necking part via a uniaxial tensile test. Next, the small specimens are cut from the necking parts in an arbitrary direction with respect to the tensile direction of the large specimens. The anisotropic mechanical characteristics in the small specimens are evaluated by a uniaxial tensile test and the strain distribution is measured by the digital image correlation. The result shows that the stress-strain curve of the small specimen depends on the cutting angle to the tensile direction of the large specimens. The elastic modulus and the maximum stress of the small specimens are maximum in the tensile direction of the large specimen, and the elastic modulus and the maximum stress decreases with increasing the cutting angle. Therefore, the deformation-induced anisotropic mechanical characteristics in the necking part are observed. In addition, if the uniaxial tensile direction to the small specimen differs from that to the large specimen, a shear strain band appears in the small specimen and the longitudinal direction of the shear strain band is affected to the tensile direction of the large specimen. The test results indicate that the anisotropic elastic modulus and the anisotropic characteristics in the plastic region are expressed by the anisotropic elastic constitutive equation and the Tsai-Hill criterion, respectively. Moreover, the anisotropic strain hardening is revealed because the Tsai-Hill parameters depends on the plastic strain.
format	article
author	Sho HIGUCHI Kenichi SAKAUE
author_facet	Sho HIGUCHI Kenichi SAKAUE
author_sort	Sho HIGUCHI
title	Evaluation of deformation-induced anisotropy for plastically deformed polycarbonate
title_short	Evaluation of deformation-induced anisotropy for plastically deformed polycarbonate
title_full	Evaluation of deformation-induced anisotropy for plastically deformed polycarbonate
title_fullStr	Evaluation of deformation-induced anisotropy for plastically deformed polycarbonate
title_full_unstemmed	Evaluation of deformation-induced anisotropy for plastically deformed polycarbonate
title_sort	evaluation of deformation-induced anisotropy for plastically deformed polycarbonate
publisher	The Japan Society of Mechanical Engineers
publishDate	2021
url	https://doaj.org/article/ecc27ef9965d40cf811c327e3de5deed
work_keys_str_mv	AT shohiguchi evaluationofdeformationinducedanisotropyforplasticallydeformedpolycarbonate AT kenichisakaue evaluationofdeformationinducedanisotropyforplasticallydeformedpolycarbonate
_version_	1718407620094590976

Evaluation of deformation-induced anisotropy for plastically deformed polycarbonate

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