Question

a proposed exploration ship capable of interstellar and undersea exploration is being evaluated for structural stability. the vessel is made of double hollow concentric spherical vessel with an inside radius of 2.0 m and 2.5 m. made from titanium alloy steel (Ti-6Al-4V) plates with 300 mm thickness. for the safety of the crew, the atmosphere in vessel is maintained from 0.9 to 1.2 atm. a. estimate the maximum stress in the vessel during the inter-planetary space observations (absolute vacuum).

B. Estimate the maximum depth the vessel is capable of during the undersea observations below sea level (deepest in the mariana trench is 11,000 m below sea level). Assume average SG of seawater to be 1.20.
Assume the material Ti-6Al-4V has at sub zero temperature s allowable = 150 MPA

Answer 1