Damage-property analysis of carbon fiber-reinforced plastic based on homogenization theory

In this study, the damage-development behavior of carbon fiber-reinforced plastic (CFRP) laminates considering the nonlinear mechanical properties of a matrix resin was investigated through a numerical simulation based on a homogenization theory and continuum damage mechanics. A scalar damage variab...

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Autores principales:	Keita GOTO, Takuya TOMIOKA, Masahiro ARAI
Formato:	article
Lenguaje:	EN
Publicado:	The Japan Society of Mechanical Engineers 2020
Materias:	composite material fiber-reinforced plastic continuum damage mechanics viscoplasticity homogenization Mechanical engineering and machinery TJ1-1570
Acceso en línea:	https://doaj.org/article/e3bc1f2e700b4c57a56962a089db0a1a
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spelling	oai:doaj.org-article:e3bc1f2e700b4c57a56962a089db0a1a2021-11-29T05:59:26ZDamage-property analysis of carbon fiber-reinforced plastic based on homogenization theory2187-974510.1299/mej.19-00623https://doaj.org/article/e3bc1f2e700b4c57a56962a089db0a1a2020-02-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/mej/7/4/7_19-00623/_pdf/-char/enhttps://doaj.org/toc/2187-9745In this study, the damage-development behavior of carbon fiber-reinforced plastic (CFRP) laminates considering the nonlinear mechanical properties of a matrix resin was investigated through a numerical simulation based on a homogenization theory and continuum damage mechanics. A scalar damage variable was applied to elasto-viscoplastic constitutive equations, following which, the constitutive equations were introduced into the homogenization theory for elasto-viscoplastic materials. Uniaxial tensile tests including unloading and reloading phases under several strain rates were performed using a specimen made of an epoxy resin. The damage-development behavior of the unidirectional CFRP laminates was then analyzed using the homogenization theory. From the numerical results, viscoplastic behavior was observed in the stress–strain curves, and the stress decreased drastically as the damage of the epoxy resin developed. The microscopic distributions showed that the failure initiated at the epoxy resin around the fibers arranged along the loading direction and progressed by connecting the high damage variable regions of the epoxy resin. Uniaxial tensile tests of the unidirectional CFRP laminates were also performed to validate the numerical results. The experimental fracture stresses were distributed between the maximum and minimum stresses at the failure starting points obtained from the numerical results. Thus, it was confirmed that the proposed numerical method could analyze the damage-development behavior of CFRP laminates.Keita GOTOTakuya TOMIOKAMasahiro ARAIThe Japan Society of Mechanical Engineersarticlecomposite materialfiber-reinforced plasticcontinuum damage mechanicsviscoplasticityhomogenizationMechanical engineering and machineryTJ1-1570ENMechanical Engineering Journal, Vol 7, Iss 4, Pp 19-00623-19-00623 (2020)
institution	DOAJ
collection	DOAJ
language	EN
topic	composite material fiber-reinforced plastic continuum damage mechanics viscoplasticity homogenization Mechanical engineering and machinery TJ1-1570
spellingShingle	composite material fiber-reinforced plastic continuum damage mechanics viscoplasticity homogenization Mechanical engineering and machinery TJ1-1570 Keita GOTO Takuya TOMIOKA Masahiro ARAI Damage-property analysis of carbon fiber-reinforced plastic based on homogenization theory
description	In this study, the damage-development behavior of carbon fiber-reinforced plastic (CFRP) laminates considering the nonlinear mechanical properties of a matrix resin was investigated through a numerical simulation based on a homogenization theory and continuum damage mechanics. A scalar damage variable was applied to elasto-viscoplastic constitutive equations, following which, the constitutive equations were introduced into the homogenization theory for elasto-viscoplastic materials. Uniaxial tensile tests including unloading and reloading phases under several strain rates were performed using a specimen made of an epoxy resin. The damage-development behavior of the unidirectional CFRP laminates was then analyzed using the homogenization theory. From the numerical results, viscoplastic behavior was observed in the stress–strain curves, and the stress decreased drastically as the damage of the epoxy resin developed. The microscopic distributions showed that the failure initiated at the epoxy resin around the fibers arranged along the loading direction and progressed by connecting the high damage variable regions of the epoxy resin. Uniaxial tensile tests of the unidirectional CFRP laminates were also performed to validate the numerical results. The experimental fracture stresses were distributed between the maximum and minimum stresses at the failure starting points obtained from the numerical results. Thus, it was confirmed that the proposed numerical method could analyze the damage-development behavior of CFRP laminates.
format	article
author	Keita GOTO Takuya TOMIOKA Masahiro ARAI
author_facet	Keita GOTO Takuya TOMIOKA Masahiro ARAI
author_sort	Keita GOTO
title	Damage-property analysis of carbon fiber-reinforced plastic based on homogenization theory
title_short	Damage-property analysis of carbon fiber-reinforced plastic based on homogenization theory
title_full	Damage-property analysis of carbon fiber-reinforced plastic based on homogenization theory
title_fullStr	Damage-property analysis of carbon fiber-reinforced plastic based on homogenization theory
title_full_unstemmed	Damage-property analysis of carbon fiber-reinforced plastic based on homogenization theory
title_sort	damage-property analysis of carbon fiber-reinforced plastic based on homogenization theory
publisher	The Japan Society of Mechanical Engineers
publishDate	2020
url	https://doaj.org/article/e3bc1f2e700b4c57a56962a089db0a1a
work_keys_str_mv	AT keitagoto damagepropertyanalysisofcarbonfiberreinforcedplasticbasedonhomogenizationtheory AT takuyatomioka damagepropertyanalysisofcarbonfiberreinforcedplasticbasedonhomogenizationtheory AT masahiroarai damagepropertyanalysisofcarbonfiberreinforcedplasticbasedonhomogenizationtheory
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Damage-property analysis of carbon fiber-reinforced plastic based on homogenization theory

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