Q-1 A compound bar consists of a circular rod of steel of diameter 25 mm, rigidly fitted into a copper tube of internal diameter 25 mm and thickness 2.5 mm. If the bar is subjected to an axial load of 100 kN, find the stresses developed in the two materials. Given, Es = 2 × 105 N/mm² and Ecu 1.2 x 105 N/mm². Steel tube '25mm 2.5mm Copper tube

A brass link (Eb = 105 GPa, ab = 20.9 x 106/°C) and a steel rod (Es = 200 GPa, as = 11.7 x 106/°C) have the dimensions shown at a temperature of 20°C. The steel rod is cooled until it fits freely into the link. The temperature of the whole assembly is then raised to 45°C. Determine a.) The final stress in the steel rod b.) The final length of the steel rod 50 mm Brass 37.5 mm 37.5 mm 0.12 mm -250 mm 30-mm diameter Steel Section A-A

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The light rigid bar ABCD shown below is pinned at B and connected to two vertical rods. Assuming that the bar was initially horizontal and the rods stress-free, determine the stress in each rod after the load P = 20 kN is applied. steel L=1.5 m A=300 mm2 2 m- E= 200 GPa B D Aluminun L=2 m P = 20 kN - 1m A= 500 mm2 E= 70 GPa