Engineering Board Exam Reviewer · Strength of Materials · hard
A thin-walled cylindrical boiler with an inside diameter of 600 mm must withstand an internal pressure of 1 MPa. If the allowable tensile stress is 100 MPa, what minimum wall thickness is required (based on hoop stress)?
- 6
- 1.5
- 3
- 12
Answer
C. 3
Solution
The governing stress is the hoop stress: t = pd/(2σallow) = (1)(600)/(2 × 100) = 3 mm.
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