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.
Author: | Philipp Thumann, Stefan Buchner, Steffen Marburg, Marcus WagnerORCiDGND |
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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 |