6_ch 05 Mechanical Design budynas_SM_ch05

6_ch 05 Mechanical Design budynas_SM_ch05 - 13 . 39 kpsi...

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120 Solutions Manual • Instructor’s Solution Manual to Accompany Mechanical Engineering Design 5-7 S ut = 30 kpsi, S uc = 100 kpsi; σ A = 20 kpsi, σ B = 6 kpsi (a) MNS: Eq. (5-30 a ) n = S ut σ x = 30 20 = 1 . 5 Ans. BCM: Eq . (5-31 a ) n = 30 20 = 1 . 5 Ans. MM: Eq . (5-32 a ) n = 30 20 = 1 . 5 Ans. (b) σ x = 12 kpsi, τ xy =− 8 kpsi σ A , σ B = 12 2 ± ± ² 12 2 ³ 2 + ( 8) 2 = 16, 4 kpsi MNS: Eq. (5-30 a ) n = 30 16 = 1 . 88 Ans. BCM: Eq. (5-31 b ) 1 n = 16 30 ( 4) 100 n = 1 . 74 Ans. MM: Eq. (5-32 a ) n = 30 16 = 1 . 88 Ans. (c) σ x =− 6 kpsi, σ y =− 10 kpsi, τ xy =− 5 kpsi σ A , σ B = 6 10 2 ± ± ² 6 + 10 2 ³ 2 + ( 5) 2 =− 2 . 61,
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Unformatted text preview: 13 . 39 kpsi MNS: Eq. (5-30 b ) n = 100 13 . 39 = 7 . 47 Ans. BCM: Eq. (5-31 c ) n = 100 13 . 39 = 7 . 47 Ans. MM: Eq. (5-32 c ) n = 100 13 . 39 = 7 . 47 Ans. (d) x = 12 kpsi, xy = 8 kpsi A , B = 12 2 12 2 2 + 8 2 = 4, 16 kpsi MNS: Eq. (5-30 b ) n = 100 16 = 6 . 25 Ans....
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