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New research findings on non-proportional low cycle fatigue

Cernescu, Anghel and Pullin, Rhys 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. 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: 14 May 2020 11:15
URI: http://orca.cf.ac.uk/id/eprint/131625

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