Static and Dynamic Effects of Gear Parameter on Induced Bending Stress for Spur Gear


Aymen Ali Kanhosh, Nassear Rasheid Hmoad


Mechanical Engineering Department, University of Baghdad, College of Engineering.

Corresponding Author Email: [email protected]

This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Mechanical element design reflects the solution of engineering prediction to the working condition problems for the new or modified elements to survive during their service according to required performance characteristics. This work utilizes the concept of teeth pressure angle asymmetry to enhance the static and dynamic behavior from load carrying capacity point of view for involute teeth spur gears. Static solution uses Lewis’s beam theory to trace the effect of loaded and unloaded pressure angle on the induced bending stress under static load at teeth tip position for different pressure angle combination scenarios while the dynamic study adopts Soderberg theory to evaluate safety factor affected by different pressure angles. FEM Ansys APDL. and Workbench Ver. 18 have been used to check the analytical solutions for both of static and dynamic studies. Results have been checked with each other and with the available previous works with good conformity. It has been found that loaded side pressure angle increasing is dominant regarding the safety factor increasing and stress decreasing with about 65% and 33% reduction respectively, unloaded side pressure angle increasing decreases bending stress and increases safety factor by about 23% and 22% respectively.