Influence of additional static stresses on biaxial low-cycle fatigue of 2024 aluminum alloy

Abstract

In this paper, a previously developed modification of the Sainz model of multiaxial fatigue is reduced to an invariant form. Model constants were determined for different sets of setup experiments. It was supposed to introduce an additional summand to account for the phase shift between loading modes. The model is used to describe the fatigue behavior of the D16T aluminum alloy. Low-cycle fatigue tests under biaxial loading conditions are presented, with one mode changing cyclically and the other mode remaining constant in magnitude throughout the test. The results of cyclic durability prediction by the modified model provide good convergence.

Cyclic behavior of AA2024 aluminum alloy under different loading paths and heat treatments

“…46 Yankin et al studied biaxial fatigue of 2024 Al. 47 Fersaoui et al conducted thermo-mechanical stress analysis of steel exhaust valve. 48 The significance of these challenges cannot be overstated.…”

“…Niesłony et al studied multiaxial fatigue of AA6068 and AA2017A Al 46 . Yankin et al studied biaxial fatigue of 2024 Al 47 . Fersaoui et al conducted thermo‐mechanical stress analysis of steel exhaust valve 48 .…”