![]() Ballarini, Effect of rim thickness on gear crack propagation path, J. ![]() Agarwal et al., Fatigue crack propagation in a gear tooth in the presence of an inclusion, International Journal for Computational Methods in Engineering Science and Mechanics, 15(3) (2014) 247–252.ĭ. Sadeghi Dolatabadi, Three - dimensional fatigue crack growth modelling in a helical gear using extended finite element method, Fatigue and Fracture of Engineering Materials and Structures, 37(6) (2014) 581–591. Peng et al., Effect of laser shock peening on bending fatigue performance of AISI 9310 steel spur gear, Optics and Laser Technology, 94 (2017) 15–24.Ī. Conrado et al., A comparison of bending fatigue strength of carburized and nitrided gears for industrial applications, Engineering Failure Analysis, 78 (2017) 41–54.Ĭ. Anderson, A rotating gear test methodology for evaluation of high-cycle tooth bending fatigue lives under fully reversed and fully released loading conditions, International Journal of Fatigue, 133 (2020) 105432.Į. Wu et al., Effect of shot peening coverage on residual stress and surface roughness of 18CrNiMo7-6 steel, International Journal of Mechanical Sciences, 183 (2020) 105785. He et al., Analysis of the fatigue crack initiation of a wind turbine gear considering load sequence effect, International Journal of Damage Mechanics, 29(2) (2020) 207–225. Furthermore, the content of retained austenite of tooth root surface decreases by about 3.8 % after the gear bending fatigue failure, and the grain size of the tooth root core region illustrates a certain tendency of coarsening. The phenomena of residual stress relaxation in gear bending fatigue is observed with the maximum residual compressive stress decreasing from −698 MPa of intact state to −572 MPa of failure state. It is found that the measured tooth root crack trajectories basically conform to the dangerous section of the tooth root determined by the 30° tangent method with a slight variation of about 1°. The alternations of macroscopic mechanical properties and microstructure features of gear samples subjected to bending fatigue are experimentally examined and analyzed in detail. The fatigue crack propagation behaviors during bending fatigue test were analyzed. ![]() In this study, a serial of bending fatigue tests on case carburized and shot peening treated gears is conducted. ![]() Tooth bending fatigue remains as a fundamental bottleneck restricting the safety and reliability of modern high-performance gear. ![]()
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