This motor will spin at 85RPM delivering 1255Nm of torque.
Force = 1255Nm = 1.255*10^6Nmm^2
Modulus of Elasticity = 205 GPa
Poissons Ratio = 0.29
Modulus of Rigidity = 205/(2*(1+0.29)) or 79.457
I know the formula:
T/J = Fs/R (this might be a big oversight on my part but how do I calculate the shear stress, so that I can solve for the diameter?
1.255*10^6/ (PI/32)*D^4 = Fs/(D/2)
I feel like I have everything that I need but I just can't seem to put it together properly to solve my problem. How do I get the shear stress to calculate the needed diameter that will support this amount of torque?
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