Surface roughness effect on fatigue strength of aluminum alloy using revised stress field intensity approach

Abstract The fatigue strength of a component is known to highly depend on its surface quality, and it is thus necessary to develop a reliable and appropriate mathematical model for fatigue strength assessment that consider the effect of surface roughness. In this paper, different underlying physical...

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Autores principales:	Bingfeng Zhao, Jiaxin Song, Liyang Xie, Zhiyong Hu, Jianpeng Chen
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/2287215f3b034dd49f9421323ff3f41b
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spelling	oai:doaj.org-article:2287215f3b034dd49f9421323ff3f41b2021-12-02T17:37:12ZSurface roughness effect on fatigue strength of aluminum alloy using revised stress field intensity approach10.1038/s41598-021-98858-02045-2322https://doaj.org/article/2287215f3b034dd49f9421323ff3f41b2021-09-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-98858-0https://doaj.org/toc/2045-2322Abstract The fatigue strength of a component is known to highly depend on its surface quality, and it is thus necessary to develop a reliable and appropriate mathematical model for fatigue strength assessment that consider the effect of surface roughness. In this paper, different underlying physical mechanisms of the roughness effect at different regions of specimens were studied by fatigue testing of 7N01 aluminum alloy. For a quantitative analysis of the surface roughness effect, a revised stress field intensity approach for a fatigue strength assessment of microsized notches was proposed as a theoretical support. In the new model, a new form of weight function was built to adapt the characteristics of microsized notches. In addition, the effect of the field radius was fundamentally weakened on solution of the stress field intensity and the difficulty of fatigue failure region definition in the traditional method was overcome correspondingly in the proposed model, which made the calculated field strength accurate and objective. Finally, to demonstrate the validity of the revised approach quantitatively, specimens with conventionally sized notches were subjected to stress field intensity calculations. The results showed that the revised approach has satisfactory accuracy compared with the other two traditional approaches from the perspective of quantitative analysis.Bingfeng ZhaoJiaxin SongLiyang XieZhiyong HuJianpeng ChenNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-17 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Bingfeng Zhao Jiaxin Song Liyang Xie Zhiyong Hu Jianpeng Chen Surface roughness effect on fatigue strength of aluminum alloy using revised stress field intensity approach
description	Abstract The fatigue strength of a component is known to highly depend on its surface quality, and it is thus necessary to develop a reliable and appropriate mathematical model for fatigue strength assessment that consider the effect of surface roughness. In this paper, different underlying physical mechanisms of the roughness effect at different regions of specimens were studied by fatigue testing of 7N01 aluminum alloy. For a quantitative analysis of the surface roughness effect, a revised stress field intensity approach for a fatigue strength assessment of microsized notches was proposed as a theoretical support. In the new model, a new form of weight function was built to adapt the characteristics of microsized notches. In addition, the effect of the field radius was fundamentally weakened on solution of the stress field intensity and the difficulty of fatigue failure region definition in the traditional method was overcome correspondingly in the proposed model, which made the calculated field strength accurate and objective. Finally, to demonstrate the validity of the revised approach quantitatively, specimens with conventionally sized notches were subjected to stress field intensity calculations. The results showed that the revised approach has satisfactory accuracy compared with the other two traditional approaches from the perspective of quantitative analysis.
format	article
author	Bingfeng Zhao Jiaxin Song Liyang Xie Zhiyong Hu Jianpeng Chen
author_facet	Bingfeng Zhao Jiaxin Song Liyang Xie Zhiyong Hu Jianpeng Chen
author_sort	Bingfeng Zhao
title	Surface roughness effect on fatigue strength of aluminum alloy using revised stress field intensity approach
title_short	Surface roughness effect on fatigue strength of aluminum alloy using revised stress field intensity approach
title_full	Surface roughness effect on fatigue strength of aluminum alloy using revised stress field intensity approach
title_fullStr	Surface roughness effect on fatigue strength of aluminum alloy using revised stress field intensity approach
title_full_unstemmed	Surface roughness effect on fatigue strength of aluminum alloy using revised stress field intensity approach
title_sort	surface roughness effect on fatigue strength of aluminum alloy using revised stress field intensity approach
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/2287215f3b034dd49f9421323ff3f41b
work_keys_str_mv	AT bingfengzhao surfaceroughnesseffectonfatiguestrengthofaluminumalloyusingrevisedstressfieldintensityapproach AT jiaxinsong surfaceroughnesseffectonfatiguestrengthofaluminumalloyusingrevisedstressfieldintensityapproach AT liyangxie surfaceroughnesseffectonfatiguestrengthofaluminumalloyusingrevisedstressfieldintensityapproach AT zhiyonghu surfaceroughnesseffectonfatiguestrengthofaluminumalloyusingrevisedstressfieldintensityapproach AT jianpengchen surfaceroughnesseffectonfatiguestrengthofaluminumalloyusingrevisedstressfieldintensityapproach
_version_	1718379872257048576

Surface roughness effect on fatigue strength of aluminum alloy using revised stress field intensity approach

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