Multiaxial fatigue: a stress based criterion for hard metals

In this paper, a new multiaxial high cycle fatigue endurance criterion is proposed within the setting of situations where the mechanical component is subjected to iso-frequency in-phase or out-of-phase sinusoidal multiaxial loadings. It considers, as measures of fatigue solicitation: (i) a new function of the shear stress amplitude, which is capable to account for the nonproportional character of the loading history and (ii) the maximum principal stress along the stress history. Assessment of the resulting criterion shows that it compares very well with experimental data published in the literature.