Influence of additional static stresses on biaxial low-cycle fatigue of 2024 aluminum alloy
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https://orcid.org/0000-0002-0895-4912
Anastasia Lykova
Center of Experimental Mechanics, Perm National Research Polytechnic University, Perm, Russian Federation
https://orcid.org/0000-0003-4873-6351
Artur Mugatarov
Center of Experimental Mechanics, Perm National Research Polytechnic University, Perm, Russian Federation
https://orcid.org/0000-0002-2229-8181
Valeriy Wildemann
Center of Experimental Mechanics, Perm National Research Polytechnic University, Perm, Russian Federation
Artem Ilinykh
Center of Experimental Mechanics, Perm National Research Polytechnic University, Perm, Russian Federation
https://orcid.org/0000-0001-9162-1053
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.
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