I am trying to find the stress on a pin caused by a reaction force. The pin holds a jaw arm for a gear/bearing puller. I've attached pictures of what the Jaw arm + pin would look like, and also just the pin itself with fixtures and a load applied. Before I ran the simulation I did a simple shear calculation on the pin:
shear = V/A = 4V/pi*d^2
'V' in this case is going to be a load of 10/3 Tons, so about 6667 lbf. The diameter of the pin is 0.375 in. The shear stress is about 60,000 psi using that calculation.
So I set up the pin as shown, figuring the jaw arm only contacts a portion of that surface causing the reaction. Once I get done with the simulation I get a max shear stress of over 100,000 psi as shown. Am I missing something here? Maybe I oversimplified my hand calculation, I'm not sure...