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A spherical pressure vessel (made of mild steel) of internal diameter 500 mm and thickness 10 mm is subjected to an internal gauge pressure of 4000 kPa. If the yield stress of mild steel is 200 MPa, the factor of safety (up to one decimal place) is ______
Gate Productivity Engineering
Given :
d = 500 mm, t = 10 mm, p = 4000 kPa, σy = 200 MPa
σh = Pd/4t = 50000kPa
σy = 200 MPa = 200 × 10^3 kPa
FOS = σy/σh = 200000/50000
Therefore Factor of Safety = 4
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