The ship is pushed through the water using an A36 steel prop

The ship is pushed through the water using an A-36 steel propeller shaft that is 8 m long, measured from the propeller to the thrust bearing D at the engine. If it has an outer diameter of 300 mm and a wall thickness of 30 mm, determine the amount of axial contraction of the shaft when the propeller exerts a force on the shaft of 5 kN. The bearings at B and C are journal bearings.

Solution

Axial Contraction = P*L/A*E

= -5 * 1000 * 8 * 4/ 3.142 * (0.4*0.4 - 0.3*0.3) * 200 * 10^9
              
               = -3.64 * 10^-3 mm