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  3. bonus problem 3 marks a stepped steel shaft as shown...

Question: bonus problem 3 marks a stepped steel shaft as shown...

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Bonus Problem (3 marks) A stepped steel shaft as shown in the figure below transmits a torque of 5000 lbf-in. A close-up of the stepped region BC is shown as a separte figure. The elastic modulus and Poissons ratio of the shaft material are 3x10 psi and 0.3 respectively. All shaft dimensions are shown directly on the figure. Determine the maximum torsional shear stress in the shaft as well as the relative angle of twist between the points A and D. b-in 000 b-in 2 in diameter 10 in
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