A part is loaded with a combination of bending, axial, and torsion such that the following stresses
Question:
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 Kf,bending = 1.4, Kf,axial = 1.1, and Kf,torsion = 2.0. The material properties are Sy = 300 MPa and Su = 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.
Step by Step Answer:
Shigleys Mechanical Engineering Design
ISBN: 978-1121345317
9th edition
Authors: Richard G. Budynas, J. Keith Nisbett