고체역학 (Beer) — Transformations of Stress and Strain: Problem 7.118

7.118 For the tank of Prob. 7.117, determine the largest allowable gage pressure, knowing that the allowable normal stress perpendicular to the weld is 18 ksi and the allowable shearing stress parallel to the weld is 10 ksi. (Reference from Prob. 7.117: The pressure tank shown has a 0.375-in. wall thickness and butt-welded seams forming an angle \(\beta = 20^\circ\) with a transverse plane.)