Under normal operating conditions, the electric motor exerts atorque of 2.8 kN*m

Question

Under normal operating conditions, the electric motor exerts atorque of 2.8 kN*m on shaft AB. Knowing that each shaft is soild,determine the maxmiun shearing stress in (a) shaft AB, (b) shaftBC, (c) shaft CD. The posted answers on cramster are not match the questions.Thanks! Under normal operating conditions, the electric motor exerts atorque of 2.8 kN*m on shaft AB. Knowing that each shaft is soild,determine the maxmiun shearing stress in (a) shaft AB, (b) shaftBC, (c) shaft CD. The posted answers on cramster are not match the questions.Thanks!

Explanation / Answer

shear stress due to torque is defined with thisequation: = T*y/J   (1) where T is the torque applied, y is the distance measuredfrom the center of the road and J is polar moment of inertiaand it is 1/2**r4 for circular crosssections. We know what max is and applied torque. So we can solve for Radius r, Just substitute J =1/2**r4 into(1) = (2*T*y)/ (*r4) for max y=r, which means max = (2*T*r)/(*r4) = (2*T)/ (*r3) Since I don't see the original question I don't know what arethe values of r . But i think you can substitute them. Just use theequation for max and plug the numbers in. Note: be careful about units r should be in meters and T inNm. So use T =2800 Nm

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