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Energy‐based fatigue failure characteristics of materials under random bending loading in elastic‐plastic range
Author(s) -
Macek Wojciech,
Łagoda Tadeusz,
Mucha Norbert
Publication year - 2018
Publication title -
fatigue and fracture of engineering materials and structures
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.887
H-Index - 84
eISSN - 1460-2695
pISSN - 8756-758X
DOI - 10.1111/ffe.12677
Subject(s) - materials science , structural engineering , bending , range (aeronautics) , strain energy density function , stress (linguistics) , energy (signal processing) , strain energy , fatigue limit , composite material , plastic bending , elastic energy , strain (injury) , engineering , finite element method , mathematics , physics , bending stiffness , thermodynamics , medicine , linguistics , philosophy , statistics
Abstract This article presents selected aspects connected to the methods of identification of strain energy density that are used to calculate the fatigue strength of materials. The authors focus on selected methods for determination of energy‐based (stress‐strain) characteristics of the fatigue life of materials (W a − N f ), including a new approach for the determination of strain energy density parameter W a . The paper also contains description and evaluation of models for determining the stress amplitudes σ a in the elastic‐plastic range, for bending. The developed procedure should give new capabilities in fatigue life calculations.