rails of a railroad are 12 m with a clearance of 3 mm at 15 oC. Calculate: 1.1 The change in temperature that will cause the rails to touch. 1.2 The stresses that would be induced at this new temperature if there were no initial clearance (E = 200 GPa and α = 12 × 10-

At a point on the free surface of a machine part (E = 214 GPa, G = 83 GPa), the state of the stress is illustrated in the figure below. For the given plane stress condition determine: -all 3 principle stresses, the max in plane stress, average noemal stress and the absolut max shear stress. - Show the principle stress, the max inplane shear stress and the average normal stress on an appropriate schematic