A frequency-domain critical plane criterion is here proposed to estimate fatigue life of smoothmetallic structural components under multiaxial random loading. The procedure consists of thefollowing three steps: (a) definition of the critical plane; (b) PSD evaluation of an equivalent normalstress; (c) computation of the fatigue life. A new formulation to define the critical plane is adopted inorder to improve the criterion as far as the lifetime estimation is concerned. The criterion isnumerically validated through comparison of the obtained results with experimental fatigue data,available in the literature, for structural steel subjected to non-proportional bending and torsion.
A frequency-domain HCF criterion for biaxial random loading
Ronchei Camilla;
2015-01-01
Abstract
A frequency-domain critical plane criterion is here proposed to estimate fatigue life of smoothmetallic structural components under multiaxial random loading. The procedure consists of thefollowing three steps: (a) definition of the critical plane; (b) PSD evaluation of an equivalent normalstress; (c) computation of the fatigue life. A new formulation to define the critical plane is adopted inorder to improve the criterion as far as the lifetime estimation is concerned. The criterion isnumerically validated through comparison of the obtained results with experimental fatigue data,available in the literature, for structural steel subjected to non-proportional bending and torsion.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
