The cylindrical pressure vessel has an inner diameter of 750 mm and a wall thickness of 9 mm. The vessel is constructed by welding steel plate along a helix at 50° from the longitudinal axis. If the internal gage pressure is 15 MPa, 50 (a) draw a neat Mohr's circle for the state of stress at a point on the welded seam, (b) use the Mohr's circle to determine the normal stresses and the shear stress acting parallel and perpendicular to the seam, (c) sketch the state of stress on an element aligned with the seam.

The pressure tank shown is fabricated from spirally wrapped metal plates that are welded at the seams in the orientation shown where β=55∘β=55∘. The tank has an inside diameter of 26.626.6 in.in. and a wall thickness of 0.3500.350 in.in.  Determine the largest gage pressure that can be used inside the tank if the allowable normal stress perpendicular to the weld is 18.518.5 ksiksi and the allowable shear stress parallel to the weld is 8.58.5 ksiksi.

Thank you in advance, note it ask for stress a B

The pressure tank is fabricated from spirally wrapped metal plates that are welded at the seams in the orientation shown. The tank has an inside diameter of 700 mm and a wall thickness of 8.9 mm. For a gage pressure of 1.27 MPa, determine (a) the normal stress perpendicular to the weld (use positive for tension, negative for compression) and (b) the shear stress (absolute value) parallel to the weld. Assume = 51. s Answers: (a) Normal stress= (b) Shear stress - MPa MPa