Author(s)

T. Łagoda, E. Macha & A. Niesłony

Abstract

Fatigue life estimation under multiaxial loading based on the spectral analysis of stochastic processes T. Eagoda, E. Macha & A. Nieslony Department of Mechanics and Machine Design, Technical University of Opole, Poland Abstract The paper contains an algorithm for the estimation of fatigue life in HCF regimes under multiaxial random loading using spectral methods. Loadings of Gaussian distribution and narrow- and broadband frequency spectra were assumed. Various characteristic states of multiaxial loading were considered. The reduced stress history was determined with the use of failure criteria of multiaxial fatigue based on the critical plane. For determination of the critical plane position the methods of variance and damage accumulation were applied. During simulation, the authors compared the results obtained by a spectral method in the frequency domain with those from the rain-flow algorithm in the time domain. The paper also contains the results of fatigue tests for 18G2A structural ste

Keywords