I need to find the forces in each tube but I keep getting stuck. I have been getting really long equations to do algibra onwhich I suspect might be where the error was comming from.

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)
8th Edition
ISBN:9781305387102
Author:Kreith, Frank; Manglik, Raj M.
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Chapter3: Transient Heat Conduction
Section: Chapter Questions
Problem 3.4P
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I need to find the forces in each tube but I keep getting stuck. I have been getting really long equations to do algibra onwhich I suspect might be where the error was comming from.

The values I have tried are

F2 = -0.97786, and -4.889 kips

Part 1
Correct
A hollow steel [E = 30,000 ksi] tube (1) with an outside diameter of 3.25 in. and a wall thickness of 0.225 in. is fastened to a solid
1.75-in.-diameter aluminum [E = 10,000 ksi] rod. The assembly is attached to unyielding supports at the left and right ends and is
loaded as shown. Assume P=18 kips, Q-10 kips, L₁=4ft, L2=6 ft, and L3=6 ft. Determine
(a) the stresses in all parts of the axial structure.
(b) the deflections of joints B and C.
Answers:
A₁ =
L₁
A₂ = A3 =
(1)
2.138
2.405
P
eTextbook and Media
(2)
Calculate the cross-sectional area of steel tube (1), A₁, and the cross-sectional area of the aluminum rods (2) and (3).
L2
in.²
Q
in.2
(3)
L3
D
Attempts: 1 of 6 used
Transcribed Image Text:Part 1 Correct A hollow steel [E = 30,000 ksi] tube (1) with an outside diameter of 3.25 in. and a wall thickness of 0.225 in. is fastened to a solid 1.75-in.-diameter aluminum [E = 10,000 ksi] rod. The assembly is attached to unyielding supports at the left and right ends and is loaded as shown. Assume P=18 kips, Q-10 kips, L₁=4ft, L2=6 ft, and L3=6 ft. Determine (a) the stresses in all parts of the axial structure. (b) the deflections of joints B and C. Answers: A₁ = L₁ A₂ = A3 = (1) 2.138 2.405 P eTextbook and Media (2) Calculate the cross-sectional area of steel tube (1), A₁, and the cross-sectional area of the aluminum rods (2) and (3). L2 in.² Q in.2 (3) L3 D Attempts: 1 of 6 used
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