In this study, the fatigue performances of symmetrical and asymmetrical spur gears were analyzed by performing single tooth bending fatigue tests. The gears tested were determined to be symmetrical spur gears with a 20°/20° pressure angle, asymmetrical spur gears with a 20°/22° pressure angle, and asymmetrical spur gears with a 20°/25° pressure angle. These gears were made of AISI 4140 material. Single tooth bending fatigue tests were performed under variable loads. Considering the tests performed at the same torque values in asymmetrical spur gears with a 20°/22° pressure angle compared to symmetrical spur gears with a 20°/20° pressure angle, a statistically significant increase in performance was achieved at close to 90%. While gears with 20°/20° and 20°/22° pressure angles break at the tooth root, tooth flank fracture was observed in relatively high numbers of cycles in asymmetric spur gears with a 20°/25° pressure angle. It was observed that the formation of tooth flank damage negatively affected the fatigue performance.

本研究通过单齿弯曲疲劳试验分析了对称和非对称正齿轮的疲劳性能。测试的齿轮被确定为压力角为 20°/20° 的对称正齿轮、压力角为 20°/22° 的非对称正齿轮和压力角为 20°/25° 的非对称正齿轮。这些齿轮由 AISI 4140 材料制成。在可变载荷下进行单齿弯曲疲劳试验。考虑到与压力角为 20°/20° 的对称正齿轮相比，压力角为 20°/22° 的非对称正齿轮在相同扭矩值下进行的测试，在统计上实现了接近 90% 的显着性能提升. 当压力角为 20°/20° 和 20°/22° 的齿轮在齿根处断裂时，在压力角为 20°/25° 的非对称正齿轮中，在相对较高的循环次数中观察到齿面断裂。据观察，齿面损伤的形成对疲劳性能产生负面影响。