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A steel E 29200 ks 67 106A1F pipe column 1 with a cross-sectional area of A1 580 in2 and L1110in is connected at flange B to an aluminum alloy

A steel E 29200 ks 67 106A1F pipe column 1 with a cross-sectional area of A1 580 in2 and L1110in is connected at flange B to an aluminum alloy

A steel [E = 29,200 ksi; ? = 6.7 x 10-6/A????1F] pipe column (1) with a cross-sectional area of A1 = 5.80 in.2 and L1=110in is connected at flange B to an aluminum alloy [E = 10,800 ksi; ? = 12.7 x 10-6/A????1F] pipe (2) with a cross-sectional area of A2 = 4.20 in.2 and L2=127in. The assembly (shown in the figure) is connected to rigid supports at A and C. It is initially unstressed at a temperature of 88A????1F.
(a) At what temperature will the normal stress in steel pipe (1) be reduced to zero?
(b) Determine the normal stresses (positive if tensile, negative if compressive) in steel pipe (1) and aluminum pipe (2) when the temperature reaches -17A????1F.

rahul 09-Jul-2020

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