Engineering Board Exam Reviewer · Strength of Materials · hard
A solid 55-mm diameter shaft transmits 80 kW at 900 rpm. What is the maximum shear stress developed in the shaft?
- 25.98
- 51.97
- 12.99
- 2.72
Answer
A. 25.98
Solution
T = 60P/(2π n) = 60(80 × 1000)/(2π × 900) = 848.83 N· m. max = 16T/(π d3) = 16(848826.36 N· mm)/(π (55)3) = 25.98 MPa.
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