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Unformatted text preview: r=b/a . Show that to obtain minimum twist angle ( min( ) ) and minimum max stress ( min( max ) ), t should be as small as possible. Remember that the crosssectional area (hence weight) is to remain constant! 3. Repeat Problem 2 for when the crosssection is slit open at one of the corners. However, for part a, show that the aspect ratio does not matter, and for part b show that the thickness should be as large as possible....
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 Fall '09
 Kim

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