pic: 254/968 Gearbox - Destructive Testing Results

[Travis Covington]

Originally Posted by Travis Schuh

How were you able to calculate the strength of the components?

Thanks, Travis

For gear tooth strength, we used the Barth revision of the Lewis bending forumula. For other strengths, we used other bending eqns, torque eqns, and shear strength eqns depending on the part we were analyzing.

We also did finite element analysis on all of the components to verify that our initial calcs were correct.

Here is an example of the FEA for the 80 tooth gear. These parts were subjected to two 20 KSI loads on the gear teeth, ~ 90 degrees apart.

Stress Distribution





Displacement