5. Figure 4 shows a steel cylinder of outside diameter D) = 60 mm and wall thickness t = 8 mm resting on a rigid foundation. A cylinder of rubber just fits inside the steel cylinder and is of length L = 60 mm. L= A piston is now pushed into the cylinder by a force F = 3 kN, causing the rubber to become compressed. Find the pressure exerted by the rubber on (i) the curved internal surfaces of the steel cylinder and (ii) on the end face, and hence determine the location and magnitude of the maximum stress in the steel. Assume that the contact between the rubber and the cylinder is frictionless. (Erubber = 5 MPa, rubber = 0.45, Esteel = 210 GPa, Vsteel = 0.3) Hint: Since Esteel Erubber, you can treat the steel cylinder as (relatively) rigid. rubber D Figure 4