A solid circular rod of diameter d undergoes a bending moment M = 1000lbf in inducing
Question:
A solid circular rod of diameter d undergoes a bending moment M = 1000lbf ∙ in inducing a stress σ = 16M/(πd3). Using a material strength of 25kpsi and a design factor of 2.5, determine the minimum diameter of the rod. Using Table A–17 select a preferred fractional diameter and determine the resulting factor of safety.
TableA–17
Transcribed Image Text:
Fraction of Inches 1 1 1 3 1 5 31 5 371 9 5 1 3 7 64, 32 , 16, 32 , 8, 32, 16, 4, į6, 8, 16, 2, 16, 8, 16, 4, 8, '' ·4"·° , 4,~, ~4,-2,-4° , 31,34,3.4,44.4,45,51.54, 54.6,647, 7 8, 84.9,94 10, 104, 11, 114. 12, 123. 13, 13, 14, 143. 15, 151, 16, 163. 17, 17 18, 18, 19, 19, 20 4 24 Decimal Inches 0.010, 0.012, 0.016, 0.020, 0.025, 0.032, 0.040, 0.05, 0.06, 0.08, 0.10, 0.12, 0.16, 0.20, 0.24. 0.30, 0.40, 0.50, 0.60, 0.80,.00 1.20, 140, 1.60, 1.80, 2.0, 2.4, 2.6, 2.8, 3.0, 3.2,3.4.3.6, 3.8, 4.0, 4.2. 4.4, 4.6,4.8, 5.0, 5.2. 5.4, 5.6, 5.8, 6.0,7.0, 7.5, 8.5, 9.0, 9.5, 10.0, 10.5, 11.0,.5, 12.0, 12.5, 13.0, 13.5, 14.0, 14.5, 15.0, 15.5, 16.0, 16.5, 17.0, 17.5, 18.0, 18.5, 19.0, 19.5, 20 Millimeters 0.05, 0.06, 0.08, 0.10, 0.12, 0.16, 0.20, 0.25, 0.30, 0.40, 0.50, 0.60, 0.70, 0.80, 090, 1.0,. 1.2., 1.4, 1.5, 1.6, 1.8, 2.0, 2.2, 2.5, 2.8, 3.0, 3.5, 4.0, 4.5, 5.0, 5.5, 6.0, 6.5, 7.0, 8.0.9.0, 10, 12, 14, 16, 18, 20, 22, 25, 28, 30, 32, 35, 40, 45, 50, 60, 80, 100, 120, 140, 160, 180, 200, 250, 300 Renard Numbers Ist choice, R5: 1.6, 2.5, 4, 6.3, 10 2d choice, R10:.25, 2, 3.15, 5, 8 3d choice, R20:12, .4, 1.8, 2.24, 2.8, 3.55, 4.5, 5.6. 7.1.9 4th choice, R40: 1.06, 118, 1.32. 1.5, 1.7, 1.9, 2.12,2.36, 2.65, 3, 3.35, 3.75, 4.25, 4.75, 5.3, 6, 6.7, 7.5, 8.5, 9.5
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Shigleys Mechanical Engineering Design
ISBN: 978-1121345317
9th edition
Authors: Richard G. Budynas, J. Keith Nisbett
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