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Shear stress on spline teeth
Hi, I'm checking the shear stress on B100x94 (DIN 5482) spline teeth and am a little confused now after attempting to cross check my results.
When using the method described in "When splines need Stress control", I get a Shear stress of 216MPa (note: this calc assumes 50% tooth engagement)
[ATTACH]2272[/ATTACH]
but when I use the calc found on this site I get, I get roughly 191MPa, with only 25% tooth engagement and a much shorter spline length.
[URL]https://www.engineersedge.com/gears/involute-gear-design.htm[/URL]
Can somebody share the referenced pages of "Machine Design: Theory & practice", or perhaps explain how this calc works? I found an excel version of it and I still don't understand it. The formula in the excel spreadsheet I found is 16*$Torque/(PI()*DiametralPitch^2*EffectiveLength)
My input data is:
No teeth: 44
PCD: 99mm (3.89 in)
Torque: 32143Nm (284489.5 lbf.in)
tooth thickness: 2.008mm (0.079055 in)
Spline length: 68mm (2.677 in)
Km factor: 1
Any help would be greatly appreciated :)