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1300_Mechanics Homework Mechanics of Materials Solution

1300_Mechanics Homework Mechanics of Materials Solution -...

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Unformatted text preview: 10.127 Two 4 X 3 X I} -in. steel angles are welded together to form the column AB. PROBLEM I 127 An ax1al load P of magmtude 14 laps ls apphed at pomt D. Using the allowable- stress method, detennine the largest allowable length L. Assume E = 29 x 10" psi. and a} = 36 ksi. SOLUTION One “”11" L ”x3fi% A: 2.48 in‘ Ixr‘sflCt'n, 53144.3 r,=t.2¢.-... yrl.28 .-..., J ljrmz in”, g.- 0.87”!th Krone? in "Km angle: A "' (FDCQJ-tfll 7 4.96 {n‘ = (“334) r 7.42 0.3 5,: mam) = 2.42 .39) a: L26) 3 = l.28 an. ’1 =(2)[a.qa+(2.qel(o-1szl‘] = (3.873 in” = In.“ lewd-73;? l28--— = LOQZS'M _ H 1.0 s I. w = q-qe-f +( )-( mg? x 28) " 5.2qq k‘hr' E= 2‘7000 Im‘ . = ILL—— 230005 : mg: L. “‘5 Assume 6.4-5! [42 LL/Y‘w.) (V‘ l"... 4..) I. 92 621/ T1<2cf0003 . > C n.“ t-VHM‘J l (mamas) [€7.23 ‘ ,= 197.2 m“ =(Ie;7.s)(r.nfl r was in. -- m.% H ...
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