5_ch 07 Mechanical Design budynas_SM_ch07

5_ch 07 Mechanical Design budynas_SM_ch07 -...

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182 Solutions Manual • Instructor’s Solution Manual to Accompany Mechanical Engineering Design (a) xy-plane ± M O = 240(5 . 75) F y A (11 . 5) 46 . 6(14 . 25) = 0 F y A = 240(5 . 75) 46 . 6(14 . 25) 11 . 5 = 62 . 3 lbf ± M A = F y O . 5) 46 . 6(2 . 75) 240(5 . 75) = 0 F y O = 240(5 . 75) + 46 . 6(2 . 75) 11 . 5 = 131 . 1 lbf Bending moment diagram xz-plane ± M O = 0 = 96(5 . 75) F z A . 5) + 128(14 . 25) F z A = 96(5 . 75) + 128(14 . 25) 11 . 5 = 206 . 6 lbf ± M A = 0 = F z O . 5) + 128(2 . 75) 96(5 . 75) F z O = 96(5 . 75) 128(2 . 75) 11 . 5 = 17 . 4 lbf Bending moment diagram: M C = ² 100 2 + ( 754) 2 = 761 lbf · in M A =
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