A bar of steel bar transmits a steady torsion of 30 kpsi while being subjected to an alternating bending stress of 45 kpsi. The material properties are given as Se 50 kpsi, Sy 72 kpsi, and Sut 85 kpsi. Find the factor of safety guarding against fatigue failure. For the fatigue analysis use: Modified Goodman criterion.

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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Question 1
A bar of steel bar transmits a steady torsion of 30 kpsi while
being subjected to an alternating bending stress of 45 kpsi. The
material properties are given as Se 50 kpsi, Sy= 72 kpsi, and
Sut= 85 kpsi. Find the factor of safety guarding against fatigue
failure. For the fatigue analysis use: Modified Goodman criterion.
Transcribed Image Text:Question 1 A bar of steel bar transmits a steady torsion of 30 kpsi while being subjected to an alternating bending stress of 45 kpsi. The material properties are given as Se 50 kpsi, Sy= 72 kpsi, and Sut= 85 kpsi. Find the factor of safety guarding against fatigue failure. For the fatigue analysis use: Modified Goodman criterion.
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