sm8 92

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PROBLEM (8.92) The side wall of the cylindrical steel pressure vessel has butt-welded seams (Fig.
P8.92). The allowable tensile strength of the joint is 90 % of that of steel. Determine the maximum value
of the seam angle
φ
if the tension in the steel is to be limiting.
SOLUTION
θ
2
σ
x
’
y
y
’
φ
x
12
σσ
=
90o θφ =+
21 2
'1
0.9 22
x1
σ
σσσ
σσ
+−
== +
111
31
0.9 cos2
44
σ
σσ =− θ
o
4.63,6.02cos =−= θθ
Thus,
oo 6.266.26904.63 =−=−=
φ
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