Multiaxial fatigue life predictions under the influence of mean-stresses
Abstract
Two materials, an Inconel 718 and a 1045 steel, are used to verify the extension of a shear strain-based parameter developed to account for out-of-phase cyclic strain hardening to multiaxial mean-stresses. Shear strain amplitude on the maximum shear strain amplitude plane and the maximum stress normal to this plane are the nominal stress-strain parameters considered in this approach. Tension-torsion and axial-internal pressure loadings using tubular specimens are employed to investigate stress-strain states that exhibit mean-strains and/or mean-stresses. Deformation response relevant to the proposed fatigue damage algorithm such as mean-stress relaxation is discussed. Adequate fatigue life correlations are obtained by implementing the proposed analysis. It is also demonstrated that methodologies successful for correlating uniaxial mean-stress data often lead to erroneous multiaxial life predictions. © 1988 by ASME.
Publication Title
Journal of Engineering Materials and Technology, Transactions of the ASME
Recommended Citation
Fatemi, A., & Kurath, P. (1988). Multiaxial fatigue life predictions under the influence of mean-stresses. Journal of Engineering Materials and Technology, Transactions of the ASME, 110 (4), 380-388. https://doi.org/10.1115/1.3226066
