Influence of static mean stresses on the fatigue behavior of 2024 aluminum alloy under multiaxial loading

Frattura ed Integrità Strutturale

Valerii Wildemann¹  Nikolai Belonogov¹  Oleg Staroverov¹  Andrey Yankin¹ 

[1] Center of Experimental Mechanics, Perm National Research Polytechnic University, Perm, Russian Federation;

关键词: multiaxial fatigue;    mean stress;    multiaxial fatigue criteria;    2024 aluminum alloy;   

DOI  :  10.3221/IGF-ESIS.51.12

来源: DOAJ

【 摘 要 】

Axial alternating fatigue tests with superimposed static torsional mean stress and shear alternating fatigue tests with superimposed static tensile mean stress are represented. A decrease in the fatigue life of the material was observed with an increase in the shear and static tensile stresses. Marin and modified Crossland methods are analyzed by means of the available experimental data. The two modifications of Sines method are proposed to take into account the static torsional stress effect (Sines+) and different slopes of the S-N curves in tension-compression and torsion tests (Sines++). It is shown that Sines++ model is the most accurate among others.

【 授权许可】

Unknown