Contact Stress Analysis for Gears of Different Helix Angle Using Finite Element MethodSantosh Patil, Saravanan Karuppanan, Ivana Atanasovska, Azmi A. Wahab and M. R. LiasMATEC Web of Conferences, 13 (2014) 04023DOI: https://doi.org/10.1051/matecconf/20141304023