(a) Consider a thin-walled cylindrical tube having a
Chapter 6, Problem 6.D2(choose chapter or problem)
(a) Consider a thin-walled cylindrical tube having a radius of 65 mm that is to be used to transport pressurized gas. If inside and outside tube pressures are 100 and 2.0 atm (10.13 and 0.2026 MPa), respectively, compute the minimum required thickness for each of the following metal alloys. Assume a factor of safety of 3.5. (b) A tube constructed of which of the alloys will costthe least amount?Yield Unit Mass Strength, Density, Cost, cAlloy Sy (MPa) R (g/cm3) ($US/kg)Steel (plain) 375 7.8 1.65Steel (alloy) 1000 7.8 4.00Cast iron 225 7.1 2.50Aluminum 275 2.7 7.50Magnesium 175 1.80 15.00
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