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Normal and Shearing Stresses

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A steel pipe of 400 mm outer diameter is fabricated from 10 mm thick plate by welding along a helix that forms an angle of 20 degrees with a plane perpendicular to the axis of the pipe. Knowing that a 250 kN axial force P is applied to the pipe, determine the normal and shearing stresses in directions respectively normal and tangential to the weld.

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This solution shows the steps to finding the normal and shearing stresses on a weld.

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A good reference book for these types of problems is "Mechanics of Materials" by F. Beer, E.
Johnston, J. DeWolf and D. Mazurek Fifth Edition. On pg 23, of this book, is discussed "stress
on an oblique plane under axial loading" which is ...

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