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1268_Mechanics Homework Mechanics of Materials Solution

# 1268_Mechanics Homework Mechanics of Materials Solution -...

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Unformatted text preview: L“ __J 10.89 A sewn lumber column with a lZS-mm-square cross section and a 3.6-m PROBLEM 10.90 eﬁ‘eetive length is made of a grade of wood that has an adjusted allowable stress for mpression parallel to the grain are = 9.2 MPa and a modulus of elasticity E = 12 GPa. Using the allowable-stress method, determine the maximum load 1’ that can be safely supported with an eccentricin of 50 m. 10.90 Solve Prob. 10.89 using the interaction method and an allowable stress in SOLUTION bending of 12.8 We. .‘ 3.C a: |2§ mm = 0.12;,“ An” = riczswoJM aha—fa: , 28-8 5‘ -: 01.2 HE: E: I2000 149:. 3mm 49w law: or 0.8 , Kce = 0-300 _ Val? = (0.3003120001 : :4 MP -/6 =0.47177 61a ‘(L/av)z (23.2? 4'5 A Q” ° C -= \+ £62352: -l/ \+ ggzozy- - Sac/62 = 0. #IS‘” P 26. Q 2:. C. 5d, c ~_- (SLQ = (q.2l(o.mss7)r 3.804 HPa- e=50mm=0ﬁ\$70m J I = ﬁat”: #(nggj‘r 20.39010“ w.‘ c :ch = 0.0625'm I _ . a ’P < . ec: - W" 5“" (o.osaXo.oas-S _ l -|- a. ASL: r. I 61,2 05.615¥10'3)(3.80‘-l «10‘ ) (20.3% no )(iza x :o‘) ll 34,7xlo3 N = 3%.? MU 4" ...
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