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Question 1 A torsion bar (𝐿 𝐴𝐵 =0.16 m) is fixed at end A; a lever arm (𝐿 ...

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Question 1

A torsion bar (𝐿𝐴𝐵=0.16 m) is fixed at end A; a lever arm (𝐿𝐵𝐶=0.20 m) is welded rigidly onto the other end at B. A force, 𝐹 = 5.9 kN, is applied vertically at the end of the lever arm at point C. 

Torsion bar: begin mathsize 14px style left parenthesis E I right parenthesis subscript A B end subscript equals space 44.5 space end stylekN.m2;  begin mathsize 14px style left parenthesis G J right parenthesis subscript A B end subscript equals space 33.2 space end stylekN.m2

Lever arm: begin mathsize 14px style left parenthesis E I right parenthesis subscript B C end subscript equals space 1.57 space end stylekN.m2

 

a) Solve the strain energy in the system, considering the energy due to bending moments and torsion only.

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