Characterization of anisotropic elastoplastic behavior of unidirectional carbon fiber reinforced thermoplastic (Anisotropic yield function and distortional hardening law)

A series of numerical material tests based on homogenization theory are carried out to characterize the anisotropic elastoplastic and hardening behavior of thermoplastic resin reinforced in one direction by carbon fibers (UD-CFRTP), and a new constitutive model is proposed to describe the characteri...
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Gespeichert in:

Autor*in:	Koji YAMAMOTO [verfasserIn] Masato SOMEMIYA [verfasserIn] Norio HIRAYAMA [verfasserIn] Kenjiro TERADA [verfasserIn]

Format:	E-Artikel
Sprache:	Japanisch

Erschienen:	2023

Schlagwörter:	composites cfrtp anisotropic elasto plastic distortional hardening numerical material testings

Übergeordnetes Werk:	In: Nihon Kikai Gakkai ronbunshu - The Japan Society of Mechanical Engineers, 2022, 89(2023), 927, Seite 23-00201-23-00201
Übergeordnetes Werk:	volume:89 ; year:2023 ; number:927 ; pages:23-00201-23-00201

Links:	Link aufrufen Link aufrufen Link aufrufen Journal toc

DOI / URN:	10.1299/transjsme.23-00201

Katalog-ID:	DOAJ101006128

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520			\|a A series of numerical material tests based on homogenization theory are carried out to characterize the anisotropic elastoplastic and hardening behavior of thermoplastic resin reinforced in one direction by carbon fibers (UD-CFRTP), and a new constitutive model is proposed to describe the characteristic material behavior. First, macroscopic stress-strain curves are obtained from numerical material tests (NMTs) conducted on a unit cell model, i.e., a representative volume element of periodic microstructures, to which uniaxial and combined stress states are applied under various conditions of stress ratios and stress paths. Using the obtained NMTs results, the initial shape of the yield surface and its evolution are investigated in detail. The results suggest that even if a resin has isotopic hardening characteristics, UD-CFRTP exhibits complex anisotropic post-yielding or, equivalently, hardening behavior. Then, a constitutive model that can describe such material behavior is originally formulated, and a step-wise identification strategy is presented to determine the material parameters. Finally, by carrying out verification analyses, we confirmed that the macroscopic stress-strain curves represented by the proposed model can be fitted to those obtained by NMTs with sufficient accuracy for practical use and that the performance of the proposed model is much better than that of a conventional constitutive law.
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language	Japanese
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callnumber-first	T - Technology
author	Koji YAMAMOTO
spellingShingle	Koji YAMAMOTO misc TJ1-1570 misc TA213-215 misc composites misc cfrtp misc anisotropic elasto plastic misc distortional hardening misc numerical material testings misc Mechanical engineering and machinery misc Engineering machinery, tools, and implements Characterization of anisotropic elastoplastic behavior of unidirectional carbon fiber reinforced thermoplastic (Anisotropic yield function and distortional hardening law)
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topic_title	TJ1-1570 TA213-215 Characterization of anisotropic elastoplastic behavior of unidirectional carbon fiber reinforced thermoplastic (Anisotropic yield function and distortional hardening law) composites cfrtp anisotropic elasto plastic distortional hardening numerical material testings
topic	misc TJ1-1570 misc TA213-215 misc composites misc cfrtp misc anisotropic elasto plastic misc distortional hardening misc numerical material testings misc Mechanical engineering and machinery misc Engineering machinery, tools, and implements
topic_unstemmed	misc TJ1-1570 misc TA213-215 misc composites misc cfrtp misc anisotropic elasto plastic misc distortional hardening misc numerical material testings misc Mechanical engineering and machinery misc Engineering machinery, tools, and implements
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title	Characterization of anisotropic elastoplastic behavior of unidirectional carbon fiber reinforced thermoplastic (Anisotropic yield function and distortional hardening law)
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title_full	Characterization of anisotropic elastoplastic behavior of unidirectional carbon fiber reinforced thermoplastic (Anisotropic yield function and distortional hardening law)
author_sort	Koji YAMAMOTO
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author_browse	Koji YAMAMOTO Masato SOMEMIYA Norio HIRAYAMA Kenjiro TERADA
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title_sort	characterization of anisotropic elastoplastic behavior of unidirectional carbon fiber reinforced thermoplastic (anisotropic yield function and distortional hardening law)
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title_auth	Characterization of anisotropic elastoplastic behavior of unidirectional carbon fiber reinforced thermoplastic (Anisotropic yield function and distortional hardening law)
abstract	A series of numerical material tests based on homogenization theory are carried out to characterize the anisotropic elastoplastic and hardening behavior of thermoplastic resin reinforced in one direction by carbon fibers (UD-CFRTP), and a new constitutive model is proposed to describe the characteristic material behavior. First, macroscopic stress-strain curves are obtained from numerical material tests (NMTs) conducted on a unit cell model, i.e., a representative volume element of periodic microstructures, to which uniaxial and combined stress states are applied under various conditions of stress ratios and stress paths. Using the obtained NMTs results, the initial shape of the yield surface and its evolution are investigated in detail. The results suggest that even if a resin has isotopic hardening characteristics, UD-CFRTP exhibits complex anisotropic post-yielding or, equivalently, hardening behavior. Then, a constitutive model that can describe such material behavior is originally formulated, and a step-wise identification strategy is presented to determine the material parameters. Finally, by carrying out verification analyses, we confirmed that the macroscopic stress-strain curves represented by the proposed model can be fitted to those obtained by NMTs with sufficient accuracy for practical use and that the performance of the proposed model is much better than that of a conventional constitutive law.
abstractGer	A series of numerical material tests based on homogenization theory are carried out to characterize the anisotropic elastoplastic and hardening behavior of thermoplastic resin reinforced in one direction by carbon fibers (UD-CFRTP), and a new constitutive model is proposed to describe the characteristic material behavior. First, macroscopic stress-strain curves are obtained from numerical material tests (NMTs) conducted on a unit cell model, i.e., a representative volume element of periodic microstructures, to which uniaxial and combined stress states are applied under various conditions of stress ratios and stress paths. Using the obtained NMTs results, the initial shape of the yield surface and its evolution are investigated in detail. The results suggest that even if a resin has isotopic hardening characteristics, UD-CFRTP exhibits complex anisotropic post-yielding or, equivalently, hardening behavior. Then, a constitutive model that can describe such material behavior is originally formulated, and a step-wise identification strategy is presented to determine the material parameters. Finally, by carrying out verification analyses, we confirmed that the macroscopic stress-strain curves represented by the proposed model can be fitted to those obtained by NMTs with sufficient accuracy for practical use and that the performance of the proposed model is much better than that of a conventional constitutive law.
abstract_unstemmed	A series of numerical material tests based on homogenization theory are carried out to characterize the anisotropic elastoplastic and hardening behavior of thermoplastic resin reinforced in one direction by carbon fibers (UD-CFRTP), and a new constitutive model is proposed to describe the characteristic material behavior. First, macroscopic stress-strain curves are obtained from numerical material tests (NMTs) conducted on a unit cell model, i.e., a representative volume element of periodic microstructures, to which uniaxial and combined stress states are applied under various conditions of stress ratios and stress paths. Using the obtained NMTs results, the initial shape of the yield surface and its evolution are investigated in detail. The results suggest that even if a resin has isotopic hardening characteristics, UD-CFRTP exhibits complex anisotropic post-yielding or, equivalently, hardening behavior. Then, a constitutive model that can describe such material behavior is originally formulated, and a step-wise identification strategy is presented to determine the material parameters. Finally, by carrying out verification analyses, we confirmed that the macroscopic stress-strain curves represented by the proposed model can be fitted to those obtained by NMTs with sufficient accuracy for practical use and that the performance of the proposed model is much better than that of a conventional constitutive law.
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title_short	Characterization of anisotropic elastoplastic behavior of unidirectional carbon fiber reinforced thermoplastic (Anisotropic yield function and distortional hardening law)
url	https://doi.org/10.1299/transjsme.23-00201 https://doaj.org/article/094a15bfba644df5af07f25445713c02 https://www.jstage.jst.go.jp/article/transjsme/89/927/89_23-00201/_pdf/-char/en https://doaj.org/toc/2187-9761
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author2	Masato SOMEMIYA Norio HIRAYAMA Kenjiro TERADA
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Characterization of anisotropic elastoplastic behavior of unidirectional carbon fiber reinforced thermoplastic (Anisotropic yield function and distortional hardening law)

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