Profit comparison of two stochastic models each pertaining to a two-unit standby oil delivering system with different modes of failure

The gear contact stress problem has been great point of interest for many years, but still an extensive research is required to understand the various parameters affecting this stress. Among such parameters, helix angle is one which has played a crucial role in variation of contact stress. Numerous studies have been carried out on spur gear for contact stress variation. Hence, the present work is an attempt to study the contact stresses among the helical gear pairs, of different materials such as Steel, Cast iron, Aluminum under static conditions, by using a 3D finite element method. The helical gear pairs on which the analysis is carried are 10, 15, 20, 25 degree helical gear sets. The helical gear contact stress is evaluated using FEA. The FEA results have been further compared with the analytical calculations. The analytical calculations are based upon AGMA equations, which are modified to include helix angle. This approach can be applied to gear design efficiently.