Calculate Normal Stress And Maximum Stresses For Spherical Caps Of A Compressed Air Tank

Question

A compressed air tank is supported by two cradles as shown in the figure. One of the cradles is designed so that it does not exert any longitudinal force on the tank. The cylindrical body of the tank has a 30in outer diameter and is fabricated from a 3/8in steel plate by butt welding along the helix that forms an angle of 25° with a transverse plane. The end caps are spherical and have a uniform wall thickness of 5/16in. For an internal gauge pressure of 180 psi.

Determine

a. The normal stress in the spherical caps

b. The maximum shearing stress in the spherical caps

c. The stresses in directions perpendicular and parallel to the helical weld using Mohr’s circle.

Summary

The question belongs to Physics and it discusses about calculation of normal stresses, maximum shearing stress and stresses in directions perpendicular and parallel to helical weld in spherical caps.

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