Bending strength simulation of asymmetric involute tooth gears

In order to enhance the load capacity of gears, researchers take notice in the asymmetric tooth gears. Asymmetric gear which has higher pressure angle of back tooth aiming to improve banding strength has been analyzed (Deng, et al., 2003). Brown et al. (Brown, et al., 2010) investigate the asymmetric tooth from both point of view of bending and scuffing. Kruger et al. (Kruger et al., 2013) analysed root stress of asymmetric gear by the boundary element method. Recently in Japan Society of Mechanical Engineers, improvement of contact strength by higher pressure angle is paid attention (Morikawa, 2013). However, they have not mentioned to torque capacity for bending considering the single tooth contact. This paper attempts the design of a tooth profile that has a higher load capacity. The root stress by change of pressure angle is analysed by FEM. Furthermore, the bending fatigue strength of tooth paying attention to the torque capacity is investigated by a simulation method based on inclusion distribution (Masuyama, et al., 2013).