A frequency-domain High-Cycle Fatigue (HCF) criterion based on the critical plane approach is here proposedto estimate fatigue life of smooth metallic structural components under multiaxial random loading.The procedure consists of the following three steps: (a) definition of the critical plane; (b) PSDevaluation of an equivalent normal stress; and (c) computation of the fatigue life. A new formulationto define the critical plane is adopted in order to improve the lifetime estimation. The criterion is validatedthrough comparison of the obtained numerical results with experimental fatigue data availablein the literature for structural steel specimens subjected to a combination of random non-proportionalbending and torsion.

Spectral fatigue life estimation for non-proportional multiaxial random loading

RONCHEI, Camilla;
2016

Abstract

A frequency-domain High-Cycle Fatigue (HCF) criterion based on the critical plane approach is here proposedto estimate fatigue life of smooth metallic structural components under multiaxial random loading.The procedure consists of the following three steps: (a) definition of the critical plane; (b) PSDevaluation of an equivalent normal stress; and (c) computation of the fatigue life. A new formulationto define the critical plane is adopted in order to improve the lifetime estimation. The criterion is validatedthrough comparison of the obtained numerical results with experimental fatigue data availablein the literature for structural steel specimens subjected to a combination of random non-proportionalbending and torsion.
Critical plane-based criterionFrequency-domain criterionMultiaxial fatigueRandom loading
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/20.500.11770/304667
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