A rod consisting of two cylindrical portions AB and BC is restrained at both ends. Portion AB is made up of steel (Es = 200 GPa, ɑs = 11.7 x 10/°C) and portion BC is made up of brass (Eb = 105 GPa, ɑb = 20.9 x 106°C). Knowing that the rod is initially unstressed, a.) Determine the stresses induced in the steel and brass segments when there is a temperature rise of 50°C. b.) If there is a gap of 0.2 mm between point C and the lower support, determine the amount of reduction of the support reactions. A -30-mm diameter 250 mm |B 50-mm diameter 300 mm C

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