Experimental investigation of gear crack behavior

Gear wheels are still the most widely used power transmission elements in spite of the progress of technology. Since it is possible to manufacture different sizes, forms and materials, it can be used in many sectors such as automotive, construction machinery, aviation, maritime, space, defence industry. Considering the progress of technology, the need for moment, speed and power increases in these sectors. As a result of these parameters, dynamic loads on the gears are also increased. For this reason, when designing the gear wheels, the impact resistance should be carefully determined by considering the impacts during operation. In this study, an experimental method was used to determine the impact loads on the gears. The tests were carried out in a special threaded impact tester designed and manufactured for this method. The operating principle of the impact tester designed and manufactured for this method. The operating principle of the impact tester is such that a detectable load is deposited from a detectable height onto the tooth of the fixed gear wheel. As a result of this process, the event of tooth breaking of the gear wheel occurs. The force, acceleration and displacement values during fracture are measured with a special device. In this study, the effects of tooth from on impact loads were investigated on two different gears, symmetrical and asymmetrical. As a result, it is determined that asymmetric gears have higher impact resistance than symmetric gears. At the same time, this study was carried out within the scope of TÜBİTAK project titled "Experimental Investigation of Impact Strength of Standard and Asymmetric Profile Gears" numbered 118 M 810.