Problem 338 A tube 0.10 in. thick has an elliptical shape shown in Fig. P-338. What torque will cause a shearing stress of 8000 psi?
Solution 338
Where: $A = \pi ab = \pi(3)(1.5) = 4.5\pi \, \text{in}^2$
$T = 0.10 \, \text{in}$
$\tau = 8000 \, \text{psi}$
$T = 2(4.5Ï€)(0.10)(8000)$
$T = 22619.47 \, \text{lb}\cdot\text{in}$
$T = 22.62 \, \text{ kip}\cdot\text{in}$ answer
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