Unformatted text preview: s y must hold q = j = 38o , s x = 4800  4800  φ F F = 9600 ® F = 4800 A = 361, 911l b (tensile) A 4. (60 points) For the vessel in problem 1, someone claims that by imposing an appropriate torque T as shown, the total shear stress parallel to the weld, t w , i.e. the one fro m the combined effects of the internal pressure and the torque, can be reduced to zero. Is this possible? Explain your answer, and, and, if the answer is that it is possible, evaluate the magnitude of T that would do that. Solution The stress state changes to T q = j = 38o , s x = 4800, s y = 9600, t xy =
I p = p ro4uter
2  p rinner 4 2 = p ( 24.5
2 4 Tr I p  244 ) = 44805.5 4 in Then φ tx y =tw = 1 1 s x  s y 2 sin 2q + t xy cos 2 =
q 4800  9600
24 sin(2 × 38o ) + T cos(2 × 38o ) = 0 ®
2
44805.5 T = 1.79 ×107 lb  in  T...
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 Fall '08
 FRANTZISKONIS
 Trigraph, Max, xy, xy cos, sx +s

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