Early Crack Propagation in Single Tooth Bending Fatigue: Combination of Finite Element Analysis and Critical-Planes Fatigue Criteria

Mechanical components, such as gears, are usually subjected to variable loads that induce multiaxial non-proportional stress states, which in turn can lead to failure due to fatigue. However, the material properties are usually available in the forms of bending or shear fatigue limits. Multiaxial fa...

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Autores principales:	Franco Concli, Lorenzo Maccioni, Lorenzo Fraccaroli, Luca Bonaiti
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	gears Single Tooth Bending Fatigue STBF Finite Element Model FEM material characterization Mining engineering. Metallurgy TN1-997
Acceso en línea:	https://doaj.org/article/50fcf212603d47df82ec0b68a4949313
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spelling	oai:doaj.org-article:50fcf212603d47df82ec0b68a49493132021-11-25T18:22:33ZEarly Crack Propagation in Single Tooth Bending Fatigue: Combination of Finite Element Analysis and Critical-Planes Fatigue Criteria10.3390/met111118712075-4701https://doaj.org/article/50fcf212603d47df82ec0b68a49493132021-11-01T00:00:00Zhttps://www.mdpi.com/2075-4701/11/11/1871https://doaj.org/toc/2075-4701Mechanical components, such as gears, are usually subjected to variable loads that induce multiaxial non-proportional stress states, which in turn can lead to failure due to fatigue. However, the material properties are usually available in the forms of bending or shear fatigue limits. Multiaxial fatigue criteria can be used to bridge the gap between the available data and the actual loading conditions. However, different criteria could lead to different results. The main goal of this paper is to evaluate the accuracy of different criteria applied to real mechanical components. With respect to this, five different criteria based on the critical plane concept (i.e., Findley, Matake, McDiarmid, Papadopoulos, and Susmel) have been investigated. These criteria were selected because they not only assess the level of damage, but also predict the direction of crack propagation just after nucleation. Therefore, measurements (crack position and direction) on different fractured gear samples tested via Single Tooth Bending Fatigue (STBF) tests on two gear geometries were used as reference. The STBF configuration was numerically simulated via Finite Elements (FE) analyses. The results of FE were elaborated based on the above-mentioned criteria. The numerical results were compared with the experimental ones. The result of the comparison showed that all the fatigue criteria agree in identifying the most critical point. The Findley and Papadopulus criteria proved to be the most accurate in estimating the level of damage. The Susmel criterion turns out to be the most conservative one. With respect to the identification of the direction of early propagation of the crack, the Findley criterion revealed the most appropriate.Franco ConcliLorenzo MaccioniLorenzo FraccaroliLuca BonaitiMDPI AGarticlegearsSingle Tooth Bending FatigueSTBFFinite Element ModelFEMmaterial characterizationMining engineering. MetallurgyTN1-997ENMetals, Vol 11, Iss 1871, p 1871 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	gears Single Tooth Bending Fatigue STBF Finite Element Model FEM material characterization Mining engineering. Metallurgy TN1-997
spellingShingle	gears Single Tooth Bending Fatigue STBF Finite Element Model FEM material characterization Mining engineering. Metallurgy TN1-997 Franco Concli Lorenzo Maccioni Lorenzo Fraccaroli Luca Bonaiti Early Crack Propagation in Single Tooth Bending Fatigue: Combination of Finite Element Analysis and Critical-Planes Fatigue Criteria
description	Mechanical components, such as gears, are usually subjected to variable loads that induce multiaxial non-proportional stress states, which in turn can lead to failure due to fatigue. However, the material properties are usually available in the forms of bending or shear fatigue limits. Multiaxial fatigue criteria can be used to bridge the gap between the available data and the actual loading conditions. However, different criteria could lead to different results. The main goal of this paper is to evaluate the accuracy of different criteria applied to real mechanical components. With respect to this, five different criteria based on the critical plane concept (i.e., Findley, Matake, McDiarmid, Papadopoulos, and Susmel) have been investigated. These criteria were selected because they not only assess the level of damage, but also predict the direction of crack propagation just after nucleation. Therefore, measurements (crack position and direction) on different fractured gear samples tested via Single Tooth Bending Fatigue (STBF) tests on two gear geometries were used as reference. The STBF configuration was numerically simulated via Finite Elements (FE) analyses. The results of FE were elaborated based on the above-mentioned criteria. The numerical results were compared with the experimental ones. The result of the comparison showed that all the fatigue criteria agree in identifying the most critical point. The Findley and Papadopulus criteria proved to be the most accurate in estimating the level of damage. The Susmel criterion turns out to be the most conservative one. With respect to the identification of the direction of early propagation of the crack, the Findley criterion revealed the most appropriate.
format	article
author	Franco Concli Lorenzo Maccioni Lorenzo Fraccaroli Luca Bonaiti
author_facet	Franco Concli Lorenzo Maccioni Lorenzo Fraccaroli Luca Bonaiti
author_sort	Franco Concli
title	Early Crack Propagation in Single Tooth Bending Fatigue: Combination of Finite Element Analysis and Critical-Planes Fatigue Criteria
title_short	Early Crack Propagation in Single Tooth Bending Fatigue: Combination of Finite Element Analysis and Critical-Planes Fatigue Criteria
title_full	Early Crack Propagation in Single Tooth Bending Fatigue: Combination of Finite Element Analysis and Critical-Planes Fatigue Criteria
title_fullStr	Early Crack Propagation in Single Tooth Bending Fatigue: Combination of Finite Element Analysis and Critical-Planes Fatigue Criteria
title_full_unstemmed	Early Crack Propagation in Single Tooth Bending Fatigue: Combination of Finite Element Analysis and Critical-Planes Fatigue Criteria
title_sort	early crack propagation in single tooth bending fatigue: combination of finite element analysis and critical-planes fatigue criteria
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/50fcf212603d47df82ec0b68a4949313
work_keys_str_mv	AT francoconcli earlycrackpropagationinsingletoothbendingfatiguecombinationoffiniteelementanalysisandcriticalplanesfatiguecriteria AT lorenzomaccioni earlycrackpropagationinsingletoothbendingfatiguecombinationoffiniteelementanalysisandcriticalplanesfatiguecriteria AT lorenzofraccaroli earlycrackpropagationinsingletoothbendingfatiguecombinationoffiniteelementanalysisandcriticalplanesfatiguecriteria AT lucabonaiti earlycrackpropagationinsingletoothbendingfatiguecombinationoffiniteelementanalysisandcriticalplanesfatiguecriteria
_version_	1718411255327227904

Early Crack Propagation in Single Tooth Bending Fatigue: Combination of Finite Element Analysis and Critical-Planes Fatigue Criteria

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