A Virtual-Strain-Energy-Density-Based Critical-Plane Criterion to Multiaxial Fatigue Life Prediction

The Smith–Watson–Topper (SWT) fatigue damage parameter has been discussed based on the critical-plane concept. It was found that the fatigue life prediction obtained by the SWT model tended to be unconservative during the non-proportional loading as only the tensile components on the plane of maximu...

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Bibliographic Details
Published in:Journal of materials engineering and performance 2020-06, Vol.29 (6), p.3913-3920
Main Authors: Li, Jing, Qiu, Yuan-ying, Tong, Xiao-long, Gao, Lei
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Chemistry and Materials Science
Corrosion and Coatings
Engineering Design
Materials Science
Quality Control
Reliability
Safety and Risk
Tribology
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Summary:The Smith–Watson–Topper (SWT) fatigue damage parameter has been discussed based on the critical-plane concept. It was found that the fatigue life prediction obtained by the SWT model tended to be unconservative during the non-proportional loading as only the tensile components on the plane of maximum principal strain range has been considered. To overcome this shortcoming, a virtual strain energy density model has been proposed using the von-Mises criterion, where the shear component on the plane of maximum principal strain range can be included during the non-proportional loading conditions. However, on the other hand, this model will be equivalent to the SWT model under the uniaxial and/or proportional loading conditions.
ISSN:1059-9495
1544-1024
DOI:10.1007/s11665-020-04919-2