A closed cylinder with inner and outer radii of 60 and 80mm, respectively,
is subjected to an internal pressure p1 = 30MPa and axial load P = 650kN.
The cylinder is made of a steel that has a yield stress of Y = 280MPa.
The Washington Apples and Fuji apples soled in Parknshop have the
same sphere ratio of 4cm. Due to the crush between apples, the apples
will contact each other and cause some area of bruise beneath the skin.
The Youngs modulus of the