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472_Mechanics Homework Mechanics of Materials Solution

472_Mechanics Homework Mechanics of Materials Solution -...

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Unformatted text preview: PROBLEM 4.212 4.212 The couple M, which acts in a vertical plane ([3: 0), is applied to an aluminum beam of the cross section shown. Determine (a) the stress at point A, (b) the stress at point B, (c) the radius of mature of the beam. Use E = 72 GPa. SOLUTION Leakey axes y and 2 4.5 shown on *Hne ska/479k. I: : &Uo)(50)3 + 2,-{5‘0030033 = o. lasagna)“ m" - oslpfsssxm“ m“ 300 N-m My: 0 — '3 : , W)‘ : —7o.‘}x10‘ Pat 0.!05833H0' = .70}: mpg. --I -3 .. High = — W = —H.17slo‘?q 1.. v 5 ‘ =—I‘-).I7~MP« "'"‘ I _ (72wo")(o.105353xro"‘) : -~———L M——-———-——— 2514“ .- M1 300 ...
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