Effects of biaxial tensile mechanical properties and non-integer exponent on description accuracy of anisotropic yield behavior

It is necessary to identify differences among biaxial tensile mechanical properties to describe the plastic anisotropy and potential adjustment ability of yield criteria with the non-integer exponent for the yield surface. Therefore, in this study, uniaxial and cruciform biaxial tensile tests were p...

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Autores principales:	Kai Du, Shaohui Huang, Minghao Shi, Leijun Li, Hongjun Huang, Saijun Zhang, Wentao Zheng, Xiaoguang Yuan
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Cruciform biaxial tensile test Shear yield locus Anisotropic yield criterion Identification strategies Non-integer exponent Associated flow rule Materials of engineering and construction. Mechanics of materials TA401-492
Acceso en línea:	https://doaj.org/article/7323058a20f04713a2282c40182e268c
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id	oai:doaj.org-article:7323058a20f04713a2282c40182e268c
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spelling	oai:doaj.org-article:7323058a20f04713a2282c40182e268c2021-11-10T04:17:31ZEffects of biaxial tensile mechanical properties and non-integer exponent on description accuracy of anisotropic yield behavior0264-127510.1016/j.matdes.2021.110210https://doaj.org/article/7323058a20f04713a2282c40182e268c2021-12-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S0264127521007656https://doaj.org/toc/0264-1275It is necessary to identify differences among biaxial tensile mechanical properties to describe the plastic anisotropy and potential adjustment ability of yield criteria with the non-integer exponent for the yield surface. Therefore, in this study, uniaxial and cruciform biaxial tensile tests were performed under 17 different loading paths: uniaxial tension in seven different directions, cruciform biaxial tension in rolling/transverse and 45°/135° sampling directions with seven and three different stress ratios, respectively. Based on the BBC2008 yield criterion, the uniaxial yield stresses, rθ-values, yield loci on the normal plane, and shear yield loci on the diagonal plane, predicted using six parameter identification strategies, were quantitatively evaluated for MP980, DP490, 6016-T4, and 5182-O. Results show the constraining and regulation ability of the equi-biaxial tensile data for yield loci to be better than that of near-plane strain state data. The parameter identification strategy considering the non-integer exponent was observed to significantly improved the ability of the yield criterion to describe the anisotropic yield behavior. For a simplified evaluation system that considers only the prediction accuracy of the yield locus under the principal stress state, neglecting the prediction accuracy for the shear yield locus may lead to incorrect judgments regarding the best identification strategy.Kai DuShaohui HuangMinghao ShiLeijun LiHongjun HuangSaijun ZhangWentao ZhengXiaoguang YuanElsevierarticleCruciform biaxial tensile testShear yield locusAnisotropic yield criterionIdentification strategiesNon-integer exponentAssociated flow ruleMaterials of engineering and construction. Mechanics of materialsTA401-492ENMaterials & Design, Vol 212, Iss , Pp 110210- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Cruciform biaxial tensile test Shear yield locus Anisotropic yield criterion Identification strategies Non-integer exponent Associated flow rule Materials of engineering and construction. Mechanics of materials TA401-492
spellingShingle	Cruciform biaxial tensile test Shear yield locus Anisotropic yield criterion Identification strategies Non-integer exponent Associated flow rule Materials of engineering and construction. Mechanics of materials TA401-492 Kai Du Shaohui Huang Minghao Shi Leijun Li Hongjun Huang Saijun Zhang Wentao Zheng Xiaoguang Yuan Effects of biaxial tensile mechanical properties and non-integer exponent on description accuracy of anisotropic yield behavior
description	It is necessary to identify differences among biaxial tensile mechanical properties to describe the plastic anisotropy and potential adjustment ability of yield criteria with the non-integer exponent for the yield surface. Therefore, in this study, uniaxial and cruciform biaxial tensile tests were performed under 17 different loading paths: uniaxial tension in seven different directions, cruciform biaxial tension in rolling/transverse and 45°/135° sampling directions with seven and three different stress ratios, respectively. Based on the BBC2008 yield criterion, the uniaxial yield stresses, rθ-values, yield loci on the normal plane, and shear yield loci on the diagonal plane, predicted using six parameter identification strategies, were quantitatively evaluated for MP980, DP490, 6016-T4, and 5182-O. Results show the constraining and regulation ability of the equi-biaxial tensile data for yield loci to be better than that of near-plane strain state data. The parameter identification strategy considering the non-integer exponent was observed to significantly improved the ability of the yield criterion to describe the anisotropic yield behavior. For a simplified evaluation system that considers only the prediction accuracy of the yield locus under the principal stress state, neglecting the prediction accuracy for the shear yield locus may lead to incorrect judgments regarding the best identification strategy.
format	article
author	Kai Du Shaohui Huang Minghao Shi Leijun Li Hongjun Huang Saijun Zhang Wentao Zheng Xiaoguang Yuan
author_facet	Kai Du Shaohui Huang Minghao Shi Leijun Li Hongjun Huang Saijun Zhang Wentao Zheng Xiaoguang Yuan
author_sort	Kai Du
title	Effects of biaxial tensile mechanical properties and non-integer exponent on description accuracy of anisotropic yield behavior
title_short	Effects of biaxial tensile mechanical properties and non-integer exponent on description accuracy of anisotropic yield behavior
title_full	Effects of biaxial tensile mechanical properties and non-integer exponent on description accuracy of anisotropic yield behavior
title_fullStr	Effects of biaxial tensile mechanical properties and non-integer exponent on description accuracy of anisotropic yield behavior
title_full_unstemmed	Effects of biaxial tensile mechanical properties and non-integer exponent on description accuracy of anisotropic yield behavior
title_sort	effects of biaxial tensile mechanical properties and non-integer exponent on description accuracy of anisotropic yield behavior
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/7323058a20f04713a2282c40182e268c
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Effects of biaxial tensile mechanical properties and non-integer exponent on description accuracy of anisotropic yield behavior

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