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EXAMPLE PROBLEM 2-1

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- The compression member shown in fig consists of solid aluminum bar A, which has an outside diameter
Of 100mm: a brass tube B, which has an outside diameter of 150mm and an inside diameter of 100mm: and a steel pipe C, which has an outside diameter of 200mm and an inside diameter of 125mm. The modulus of elasticity of the aluminume,brass,and steel are 73, 100, and 210Gpa respectively. Determine the overall shortening of the member under the action of the indicated loads.

P1=650KN

A

1m

P2=850KN

B

1.25m

P3=1500KN

0.75m

C

- A ½-in-diameter steel [E=30000 ksi, α=6.5(10-6)/0f] rod has an initial length of 6 ft. determine the change in length of the rod after a tensile load of 500 lb is applied to the rod and the temperature of the rod decreases 500f.