Question

1. (20pts) It is claimed that the Russian K278 submarine had a crush depth (depth where it fails) of 1500 meters in salt water. Assume that the specific gravity of salt water is SG-1.03. Assume that the diameter of the pressure hull is d-10m. Treat at a cylinder, assume thin walled pressure vessel approximation. Assume that the yield strength of the Titanium alloy pressure hull is σ yield-820MPa. a. Find the pressure at 1500m depth in salt water. b. Assume Pin-1atm. Find the net outside pressure on the hull (out minus in). c. Find the minimum thickness of the pressure hull. d. Verify that the criteria for a thin walled pressure vessel approximation is met. e. Go on the internet and find out where the K278 is now. Describe where it is and what happened to it in three sentences

Answer 1

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