On the assessment of multiaxial fatigue damage under variable amplitude loading

In this work, the performance of the SSF criterion is evaluated under variable amplitude loading conditions. The main objective was to inspect the validity of the hypothesis in which the SSF damage map remains valid for any high strength steel. In order to achieve that, fatigue life correlation of t...

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Bibliographic Details
Published in:Frattura ed integritá strutturale 2016-07, Vol.10 (37), p.124-130
Main Authors: Anes, V., Reis, L., de Freitas, M.
Format: Article
Language:English
Subjects:
Assessments
Austenitic stainless steels
Combined loading
Damage accumulation
Damage detection
Fatigue failure
Fatigue life
Mechanics
Metal fatigue
Multiaxial cycle counting method
Multiaxial fatigue
Shear stress
Steels
Stresses
Variable amplitude loading
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Summary:In this work, the performance of the SSF criterion is evaluated under variable amplitude loading conditions. The main objective was to inspect the validity of the hypothesis in which the SSF damage map remains valid for any high strength steel. In order to achieve that, fatigue life correlation of the 1050QT steel and 304L stainless steel was analyzed under multiaxial loading conditions. The loading block considered in the study comprises 360 proportional loading cycles with different stress amplitude ratios and stress levels. Despite being made of proportional branches, this loading block is a non-proportional loading due to its principal directions variation. This feature allows the evaluation of combined loading effects under variable amplitude loading conditions, which makes this loading block suitable to mimic the loading effects usually found in the field. Results show very good agreements, which reinforces the aforementioned hypothesis
ISSN:1971-8993
1971-8993
DOI:10.3221/IGF-ESIS.37.17