A thin-walled, closed end, cylindrical pressure vessel for jet fighter lubricant with spherical end caps is internally pressurized to 500 psi. if the mean diameter is 60.0 inches and wall thickness 1.0 inch, determine:
a) the principal stresses on an element from the cylindrical portion of the tank surface, sketch mohr's circle andsketch all principle stresses.
b) the principal stresses on an element from a portion of the spherical end caps, sketch mohr's circle, and sketch all principle stresses.