At a temperature of 20c, a 2 mm. gap exists between the ends of the two...

     

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At a temperature of 20°c, a 2 mm. gap exists between the ends of the two bars shown in Fig. Bar (1) is an aluminum alloy [E = 70 GPa, v = 0.32, a = 12.5 x 10-6/°C] bar with a width of 40 mm. and a thickness of 10 mm. Bar (2) is a stainless steel [E = 200 GPa, v = 0.12, a = 9.6 x 10-6/°C] bar with a width of 30 mm and a thickness of 10mm. The supports at A and C are rigid. Determine; (a) the lowest temperature at which the two bars contact each other. (b) the normal stress in the two bars at a temperature of 150°C. (c) the normal strain in the two bars at 150°C. (d) the change in width of the aluminum bar at a temperature of 150°C. (1) 200 mm 40mm 30 mm (2) 400 mm 2 mm gap At a temperature of 20°c, a 2 mm. gap exists between the ends of the two bars shown in Fig. Bar (1) is an aluminum alloy [E = 70 GPa, v = 0.32, a = 12.5 x 10-6/°C] bar with a width of 40 mm. and a thickness of 10 mm. Bar (2) is a stainless steel [E = 200 GPa, v = 0.12, a = 9.6 x 10-6/°C] bar with a width of 30 mm and a thickness of 10mm. The supports at A and C are rigid. Determine; (a) the lowest temperature at which the two bars contact each other. (b) the normal stress in the two bars at a temperature of 150°C. (c) the normal strain in the two bars at 150°C. (d) the change in width of the aluminum bar at a temperature of 150°C. (1) 200 mm 40mm 30 mm (2) 400 mm 2 mm gap

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