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A part is loaded with a combination of bending, axial, and torsion such that the following stresses are created at a particular location: Bending - Completely reversed, with a maximum stress of 60 MPa Axial - Constant stress of 20 MPa Torsion Repeated load, varying from 0 MPa to 50 MPa Assume the varying stresses are in phase with each other. The part contains a notch such that Kibending = 1.4, Kaxial = 1.1, and Ktorsion = 2.0. The material properties are S,= 300 MPa and S, = 400 MPa. The completely adjusted endurance limit is found to be Se= 200 MPa. Find the factor of safety for fatigue based on infinite life. If the life is not infinite, estimate the number of cycles. Be sure to check for yielding.

A part is loaded with a combination of bending, axial, and torsion such that the following stresses are created at a particular location: Bending - Completely reversed, with a maximum stress of 60 MPa Axial - Constant stress of 20 MPa Torsion Repeated load, varying from 0 MPa to 50 MPa Assume the varying stresses are in phase with each other. The part contains a notch such that Kibending = 1.4, Kaxial = 1.1, and Ktorsion = 2.0. The material properties are S,= 300 MPa and S, = 400 MPa. The completely adjusted endurance limit is found to be Se= 200 MPa. Find the factor of safety for fatigue based on infinite life. If the life is not infinite, estimate the number of cycles. Be sure to check for yielding.

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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A part is loaded with a combination of bending, axial, and torsion such that the following stresses are created at a particular location: Bending - Completely reversed, with a maximum stress of 60 MPa Axial - Constant stress of 20 MPa Torsion - Repeated load, varying from 0 MPa to 50 MPa Assume the varying stresses are in phase with each other. The part contains a notch such that Kibending = 1.4, Kaxial = 1.1, and K. = 2.0. The material properties are Sy = 300 MPa and S, = 400 MPa. The completely adjusted endurance limit is found to be Se= 200 MPa. Find the factor of safety for fatigue based on infinite life. If the life is not infinite, estimate the number of cycles. Be sure to check for yielding. f,torsion
Transcribed Image Text:A part is loaded with a combination of bending, axial, and torsion such that the following stresses are created at a particular location: Bending - Completely reversed, with a maximum stress of 60 MPa Axial - Constant stress of 20 MPa Torsion - Repeated load, varying from 0 MPa to 50 MPa Assume the varying stresses are in phase with each other. The part contains a notch such that Kibending = 1.4, Kaxial = 1.1, and K. = 2.0. The material properties are Sy = 300 MPa and S, = 400 MPa. The completely adjusted endurance limit is found to be Se= 200 MPa. Find the factor of safety for fatigue based on infinite life. If the life is not infinite, estimate the number of cycles. Be sure to check for yielding. f,torsion
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