On the Theory of Stage-by-Stage Fatigue Failure of Metals upon a Complex Stress State
- Authors: Zavoichinskaya E.B.1
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Affiliations:
- Moscow State University
- Issue: Vol 47, No 1 (2018)
- Pages: 72-80
- Section: Reliability, Strength, and Wear Resistance of Machines and Structures
- URL: https://journals.rcsi.science/1052-6188/article/view/193766
- DOI: https://doi.org/10.3103/S1052618818010156
- ID: 193766
Cite item
Abstract
This article presents a phenomenological model of brittle fatigue failure of metals and alloys upon proportional (simple) loading. The model is developed in the frames of physicomechanical approach as a set of hypotheses on the gradual development of defects in metals at various scale and structural levels (such as brittle micro- and macrocracks). On its basis, defining relationships are formulated for probability of failure with regard to defects of each level. Fatigue curves are obtained for various ultimate metal states as a consequence of the evolution of micro- and mesodefects, and the lifetime is determined with regard to a predefined level of accumulated defects. The results for structural steels are given as an example.
About the authors
E. B. Zavoichinskaya
Moscow State University
Author for correspondence.
Email: elen@altomira.ru
Russian Federation, Moscow