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Q14 A composite bar made up of aluminium and steel is rigidly attached to the...

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Q14 A composite bar made up of aluminium and steel is rigidly attached to the end supports at 60 C as shown in figure Find the stresses in the two portions of the bar when the temperature of the composite bar falls to 20 C if i the ends do not yield ii the ends yield by 0 25 mm Es 200 GPa EAI 70 GPa as 11 7 x 10 C CAI 23 4 x 10 C cross sectional areas As 250mm AAI 375mm Al 400 mm STEEL 800 mm

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