A pressure vessel of 10-in. inner diameter and 0.25-in. wall thickness is fabricated from a 4-ft section of spirally welded pipe AB and is equipped with two rigid end plates. The gage pressure inside the vessel is 300 psi, and 10-kip centric axial forces P and P′ are applied to the end plates. Determine (a) the normal stress perpendicular to the weld, (b) the shearing stress parallel to the weld.
Fig. P14.69

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