(Solved): A steel pipe of 400-mm outer diameter is fabricated from 10-mm thick plate by welding along a heli ...

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 \( 20^{\circ} \) with a plane perpendicular to the axis of the pipe. Knowing that a 300-kN axial force \( \mathbf{P} \) is applied to the pipe, determine the normal and shearing stresses in directions respectively normal and tangential to the weld. (Input the answer with the appropriate sign.) The normal stress is MPa. The shearing stress is MPa.