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a cylindrical pressure vessel with an outside diameter of 1000 mm is constructed be spirally wrapping...

a cylindrical pressure vessel with an outside diameter of 1000 mm is constructed be spirally wrapping a 15 mm thick steel plate and butt-welding the mating edges of the plate, the butt-welded seams form an angle of 30 with a transverse plane through the cylinder as shows . if the allowable normal stress perpendicular to the weld and the allowable shear stress parallel to the weld are 40 MPa and 15 MPa a respectively, determine the permissible internal pressure in the vessel if the factor of safety of 2 is applied

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