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If infinite life is not predicted, estimate the number of cycles to failure. ing.

If infinite life is not predicted, estimate the number of cycles to failure. ing.

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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The shaft shown in the figure is machined from AISI 1040 CD steel. The shaft rotates at 1600 rpm and is supported in rolling bearings at A and B. The applied forces are F1 = 2500 lbf and F2 = 2500 lbf. The location of critical bending moment from 10.5" from point A, where bending moment is 14 750 lbf·in. Determine the minimum fatigue factor of safety based on achieving infinite life. Yield strength is 71 kpsi. If infinite life is not predicted, estimate the number of cycles to failure. Also check for yielding. Note: for the given ratio of r/d = 0.0625/1.625 = 0.04, D/d = 1.875/1.625 = 1.15 the stress concentration is given by K, =1.95. Also, use the correction of the endurance limit based on the surface factor, ka, size factor, kb, and loading factor, ke -8 in- -8 in- -8 in- 3 in -10 in- -10 in in All fillets in R. 1/4
Transcribed Image Text:The shaft shown in the figure is machined from AISI 1040 CD steel. The shaft rotates at 1600 rpm and is supported in rolling bearings at A and B. The applied forces are F1 = 2500 lbf and F2 = 2500 lbf. The location of critical bending moment from 10.5" from point A, where bending moment is 14 750 lbf·in. Determine the minimum fatigue factor of safety based on achieving infinite life. Yield strength is 71 kpsi. If infinite life is not predicted, estimate the number of cycles to failure. Also check for yielding. Note: for the given ratio of r/d = 0.0625/1.625 = 0.04, D/d = 1.875/1.625 = 1.15 the stress concentration is given by K, =1.95. Also, use the correction of the endurance limit based on the surface factor, ka, size factor, kb, and loading factor, ke -8 in- -8 in- -8 in- 3 in -10 in- -10 in in All fillets in R. 1/4
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