8. (20 Points) Two cylindrical bars, of diameters d and d are confined between two large and stiff supports. Use L = 10 cm and L2 = 30 cm. Both bars are made of IN 718. Some relevant properties of IN 718 can be found in one of the papers uploaded under "Files". CTE (coefficient of thermal expansion) for IN 718 can be taken to be 14.4x10 6/C. = = Use di 10 mm and d 5 mm. Two supports are subjected to loads as shown, such that two bars go through identical elongation. It is observed that bar 1 undergoes plastic deformation, reaching yield stress (at 0.2% offset). Calculate the stress in each bar under this loaded condition and total load F. F Stiff Bar 1 Bar 2 (i) (ii) If now the load is released, calculate the residual stresses in each bar. Stiff F AL