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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 ®
44805.5 T = 1.79 ×107 lb - in - T...
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- Fall '08