Liu, T.; Qi, X.; Shi, X.; Gao, L.; Zhang, T.; Zhang, J. Effect of Loading Frequency Ratio on Multiaxial Asynchronous Fatigue Failure of 30CrMnSiA Steel. Materials2021, 14, 3968.
Liu, T.; Qi, X.; Shi, X.; Gao, L.; Zhang, T.; Zhang, J. Effect of Loading Frequency Ratio on Multiaxial Asynchronous Fatigue Failure of 30CrMnSiA Steel. Materials 2021, 14, 3968.
Liu, T.; Qi, X.; Shi, X.; Gao, L.; Zhang, T.; Zhang, J. Effect of Loading Frequency Ratio on Multiaxial Asynchronous Fatigue Failure of 30CrMnSiA Steel. Materials2021, 14, 3968.
Liu, T.; Qi, X.; Shi, X.; Gao, L.; Zhang, T.; Zhang, J. Effect of Loading Frequency Ratio on Multiaxial Asynchronous Fatigue Failure of 30CrMnSiA Steel. Materials 2021, 14, 3968.
Abstract
Multiaxial fatigue experiments under asynchronous loadings with four different loading frequency ratios were carried out on 30CrMnSiA steel. The experimental results show that the fatigue life decreases when the axial or torsion frequency increases from 1 to 2, while there is no significant change when the axial or torsion frequency increases from 2 to 4. The surface crack paths are observed and show that cracks initiate on the maximum shear stress amplitude planes, propagate approximately tens of microns, and then turn to propagate along the maximum normal stress planes. The number of secondary cracks increases when the axial or torsion frequency increases. Subsequently, the Bannantine-Socie and Wang-Brown cycle counting methods along with various multiaxial fatigue criteria and Palmgren-Miner’s cumulative damage rule were used for fatigue life prediction. The experimental results are consistent with the fatigue life predicted by the Bannantine-Socie method with the section critical plane criterion for 30CrMnSiA steel under asynchronous loading paths.
Keywords
30CrMnSiA steel; crack growth path; fatigue life prediction; asynchronous loading; frequency ratio
Subject
Engineering, Automotive Engineering
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
