A shaft is loaded in bending and torsion such that Ma = 70 N * m, Ta = 45 N * m, Mm = 55 N * m, and Tm = 35 N * m. For the shaft, Su = 700 Mpa, the true fracture strength is 1045 MPa, and a fully corrected endurance limit of Se = 210 MPa is assumed. Let Kf = 2.2 and Kfs = 1.8. With a design factor of 2.0 determine the minimum acceptable diameter of the shaft using: a. DE-Goodman criterion b. DE-Morrow criterion c. DE-Gerber criterion d. DE-SWT criterion Discuss and compare the results.

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
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A shaft is loaded in bending and torsion such that Ma = 70 N * m, Ta = 45 N * m, Mm = 55 N * m, and Tm = 35 N * m. For the shaft, Su = 700 Mpa, the true fracture strength is 1045 MPa, and a fully corrected endurance limit of Se = 210 MPa is assumed. Let Kf = 2.2 and Kfs = 1.8. With a design factor of 2.0 determine the minimum acceptable diameter of the shaft using:

a. DE-Goodman criterion

b. DE-Morrow criterion

c. DE-Gerber criterion

d. DE-SWT criterion

Discuss and compare the results.

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