A tubular tie bar made from steel having a Young's modulus of 210 GPa and a yield stress of 350 MPa has an outside diameter of 20 mm and an inside diameter of 16 mm. It carries a 1 mm thick coating of electroplated nickel, for which Young's modulus is 170 GPa and yield stress is 300 MPa. a) Calculate the maximum load that can be applied so that the factor of safety based on yield is 2. b) Sketch the radial profiles of longitudinal strain and stress produced by this load. Ans: a) 29 kN, b) 833 x 10, 175 MPa, 142 MPa