Equivalent strain-based fatigue life prediction model for multiaxial loading in diverse metallic materials
Abstract
To account for the reduction in fatigue life observed under the same equivalent strain range with increasing load path non-proportionality, this study proposes a modified ASME equivalent strain range model by introducing a life reduction factor and a non-proportionality factor. The determination method for the life reduction factor is proposed by integrating with the Fatemi-Socie model. For thin-walled specimen under symmetric cyclic loadings, the proposed method enables multiaxial fatigue life prediction without requiring complex multiaxial constitutive relationships. Furthermore, under asymmetric cyclic loadings, a fatigue life prediction model is proposed on the basis of the critical plane theory and Smith-Watson-Topper mean stress correction criterion. Notably, when the mean stress is zero, this model reduces to the equivalent strain model established in this study. Comprehensive validation using 1325 data points from 28 materials under 28 loading conditions (including 18 symmetric and 10 asymmetric cyclic loadings) confirms the model’s universal prediction capability, demonstrating high prediction accuracy for both uniaxial/multiaxial and symmetric/asymmetric loading paths.
Details
- Organisationseinheit(en)
-
Institut für Kontinuumsmechanik
- Externe Organisation(en)
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Xidian University
Norinco Group
- Typ
- Artikel
- Journal
- International journal of fatigue
- Band
- 209
- ISSN
- 0142-1123
- Publikationsdatum
- 09.03.2026
- Publikationsstatus
- Elektronisch veröffentlicht (E-Pub)
- Peer-reviewed
- Ja
- ASJC Scopus Sachgebiete
- Modellierung und Simulation, Allgemeine Materialwissenschaften, Werkstoffmechanik, Maschinenbau, Wirtschaftsingenieurwesen und Fertigungstechnik
- Elektronische Version(en)
-
https://doi.org/10.1016/j.ijfatigue.2026.109599 (Zugang:
Geschlossen
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