Probabilistic framework for multiaxial LCF assessment under material variability

The influence of material variability upon the multiaxial LCF assessment of engineering components is missing for a comprehensive description. In this paper, a probabilistic framework is established for multiaxial LCF assessment of notched components by using the Chaboche plasticity model and Fatemi-Socie criterion. Simulations from experimental results of two steels reveal that the scatter in fatigue lives can be well described by quantifying the variability of four material parameters {sigma(f)', epsilon(f)', b,c}. A procedure for choosing the safety factor for fatigue design has been derived by using first order approximation. (C) 2017 Elsevier Ltd. All rights reserved.