Three energy-based multiaxial HCF criteria for fatigue life determination in components under random non-proportional stress fields

作者: M. SHARIYAT

DOI: 10.1111/J.1460-2695.2009.01381.X

关键词: Hydrostatic stressEquivalent stressEngineeringStructural engineeringMaxima and minimaNon proportionalNew energyApplied mathematicsAmplitudeFatigue testingEnergy based

摘要: The prominent high cycle fatigue (HCF) criteria have been generally proposed based on definition of an equivalent stress that is mainly a modified version static failure criterion or yield function. One more effects including the mean normal and shear stresses, different phase shifts random frequencies components, relative instantaneous time variations locations extrema histories etc. not considered by many previously criteria. In present paper, amplitude concepts, three new energy-based HCF are to overcome mentioned shortcomings. A relevant life assessment algorithm results compared with as well experimental prepared author. To introduce comprehensive study, examined for components complicated geometries under proportional, non-proportional loadings. Results confirm efficiency accuracy Furthermore, it deduced Liu-Zenner type which include hydrostatic implicitly accurate than Papadopoulos-type consider explicitly.

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