[ASME ASME 2011 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference - Washington, DC, USA (August 28–31, 2011)] Volume 8: 11th International Power Transmission and Gearing Conference; 13th International Conference on Advanced Vehicle and Tire Technologies - An Experimental Investigation of the Effect of Tooth Asymmetry and Tooth Root Shape on Root Stresses and Single Tooth Bending Fatigue Life of Gear Teeth