Fatigue Life Prediction Under Multiaxial Variable Amplitude Loading Using A Stress-Based Criterion

This article presents fatigue life calculations for metals under different multiaxial variable amplitude loading patterns. Developed from a stress-based multiaxial fatigue criterion, a damage parameter used in the fatigue life prediction method can capture correctly different damage mechanisms (prop...

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Bibliographic Details
Published in:International journal of manufacturing, materials, and mechanical engineering materials, and mechanical engineering, 2020-01, Vol.10 (1), p.33-53
Main Authors: Quoc Huy VU, Dinh Quy VU, Thi Tuyet Nhung LE
Format: Article
Language:English
Subjects:
Cast iron
Criteria
Cumulative damage
Damage assessment
Fatigue
Fatigue failure
Fatigue life
Fatigue testing machines
High cycle fatigue
Laws, regulations and rules
Life prediction
Materials
Mathematical analysis
Medium carbon steels
Metal fatigue
S N diagrams
Variable amplitude loading
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Summary:This article presents fatigue life calculations for metals under different multiaxial variable amplitude loading patterns. Developed from a stress-based multiaxial fatigue criterion, a damage parameter used in the fatigue life prediction method can capture correctly different damage mechanisms (proportional and non-proportional multiaxiality, mean stress, asynchronous and variable amplitude) of fatigue loading in the high cycle fatigue domain. The method is based on a reference S-N curve and a cumulative damage law. Assessment of the accuracy of the proposed method is carried out with three different materials from literature (EN-GS800-2 cast iron, 39NiCrMo3 steel and SAE 1045 steel) subjected to different patterns of variable amplitude loading (blocks, non-proportional asynchronous and proportional random loading). Results reveal that the prediction method is in good accordance with the experimental data.
ISSN:2156-1680
2156-1672
DOI:10.4018/IJMMME.2020010103