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A comparative study of Glinka and Neuber approaches for fatigue strength assessment on 42CrMoS4-QT specimens

  • In fatigue strength assessment, the methods based on ideal elastic stresses according to Basquin and the less established method based on elastic-plastic stress quantities according to Manson, Coffin and Morrow are applied. The former calculates loads using linear-elastic stresses, the latter requires elasticplastic evaluation parameters, such as stresses and strains. These can be determined by finite element analysis (FEA) with a linear-elastic constitutive law, and subsequent conversion to elastic-plastic loads, using the macro support formula by Neuber. In this contribution, an alternative approach to approximate elastic-plastic parameters proposed by Glinka is compared to the the strain-life method using Neuber's formula, as well as the stress-life method of Basquin. Several component tests on 42CrMoS4-QT specimens are investigated. To determine the input data for the fatigue strength evaluations, the entire test setup is computed by FEA. The nodal displacements from these validated full-model simulations are used as boundary conditions for a submodel simulation of a notch, whose results serve as input for the fatigue strength assessments. It is shown that all approaches provide a reliable assessment of components. Our key result is that the strain-life method using the concept by Glinka for notch stress computation, yields improved results in fatigue strength assessments.

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Metadaten
Author:Philipp Thumann, Stefan Buchner, Steffen Marburg, Marcus WagnerORCiDGND
DOI:https://doi.org/10.1111/str.12470
ISSN:1475-1305
Parent Title (English):Strain
Publisher:Wiley
Document Type:Article
Language:English
Year of first Publication:2023
Release Date:2024/01/03
Tag:42CrMoS4-QT; Glinka; fatigue strength; strain-life method; stress-life method
Volume:2023
Issue:e12470
Pagenumber:21
Note:
Corresponding author: Marcus Wagner
Institutes:Fakultät Maschinenbau
Begutachtungsstatus:peer-reviewed
research focus:Produktion und Systeme
OpenAccess Publikationsweg:Hybrid Open Access - OA-Veröffentlichung in einer Subskriptionszeitschrift/-medium
Corresponding author der OTH Regensburg
Funding:DEAL Wiley
Licence (German):Keine Lizenz - Es gilt das deutsche Urheberrecht: § 53 UrhG