New research findings on non-proportional low cycle fatigue

Cernescu, Anghel ORCID: https://orcid.org/0000-0001-9513-9643 and Pullin, Rhys ORCID: https://orcid.org/0000-0002-2853-6099 2019. New research findings on non-proportional low cycle fatigue. Presented at: 12th International Conference on Multiaxial Fatigue and Fracture (ICMFF12), Bordeaux, France, 24-26 June 2019. Published in: Palin-Luc, T., Morel, F. and Carpinteri, A. eds. MATEC Web of Conferences. , vol.300 08003. 10.1051/matecconf/201930008003

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Abstract

One of the challenges regarding multiaxial fatigue damage predictions is non-proportional loading. Relevant studies have shown that these multiaxial loadings cause significant additional hardening and reduction in durability due to non-proportionality. Fatigue life predictions due to non-proportional loadings are based on an equivalent non-proportional strain range that considers a material constant related to additional hardening and a non-proportionality factor. In this paper an analysis of the non-proportional factor for three multiaxial loadings forming a square in γ/√3 – ε coordinates is carried out. One of the observations revealed by this analysis is the sensitivity of the non-proportional factor to variable shear strain rate.

Item Type:	Conference or Workshop Item (Paper)
Date Type:	Published Online
Status:	Published
Schools:	Engineering
ISSN:	2261-236X
Date of First Compliant Deposit:	14 May 2020
Date of Acceptance:	25 January 2019
Last Modified:	07 Nov 2022 10:15
URI:	https://orca.cardiff.ac.uk/id/eprint/131625

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