Evaluation of Estimation Models for Multiaxial Fatigue Life

Some of estimation models for multiaxial fatigue are reviewed. They are the high cycle fatigue (HCF) estimation models based on the Crossland criterion, the Papadopoulos criterion, the Findley criterion, the Matake criterion and the McMiarmid criterion, and the low cycle fatigue (LCF) estimation models based on the Brown and Miller, FS, and SWT parameters, respectively. The HCF estimation models are checked against the experimental data of 30NCD16 steel under fully reversed bending, fully reversed torsion, bending or tension with mean normal stress, multiaxial loading condition. Their fatigue life correlation for the fully reversed torsion tests falls within about 5% for the average absolute value of relative errors. The estimation model based on the Matake criterion can be suitable for all the loading conditions for 30NCD16 steel, its predicted lives fall within the factor three bandwidth. The LCF estimation models are evaluated by the experimental data of 1050 steel under normalized, quenched and tempered, and induction hardened conditions. For 90° out‐of‐phase loading conditions, the predicted lives by the SWT estimation model scatter within the factor three bandwidth for 1050 steel under normalized and quenched and tempered conditions. The average absolute values of estimated errors by the SWT and Brown–Miller estimation models are 10.5 and 11.5%, respectively, for quenched and tempered 1050 steel under in‐phase loading conditions.