tating steel shaft has endurance limit of Se = 343 MPa and ultimate strength of Sut = 627 MPa. A section of the shaft with dimensions is shown in the figure (D=38.5 mm, d = 35 mm, r = 3.5 mm). The section is subjected to a completely reversed bending moment of 192 Nm, accompanied by a torque alternate from 0 to 203 Nm. Calculate the fatigue factor for an infinite life using the Goodman criterion. Orientation: Use Excel spreadsheets to calculate the theoretical stress concentration factors and the notch sensitivities parameters. Bending moment Torque 203 Nm- r = 3.5 mm 192 Nm =38.5 mm = 35 mm 0 Nm. -192 Nm. pulsating cycle reversed cycle

Mechanics of Materials (MindTap Course List)
9th Edition
ISBN:9781337093347
Author:Barry J. Goodno, James M. Gere
Publisher:Barry J. Goodno, James M. Gere
Chapter3: Torsion
Section: Chapter Questions
Problem 3.7.8P: A tubular shaft being designed for use on a construction site must transmit 120 kW at 1,75 Hz, The...
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tating steel shaft has endurance limit of Se = 343 MPa and ultimate strength of Sut = 627 MPa.
A section of the shaft with dimensions is shown in the figure (D=38.5 mm, d = 35 mm, r = 3.5 mm).
The section is subjected to a completely reversed bending moment of 192 Nm, accompanied by a
torque alternate from 0 to 203 Nm. Calculate the fatigue factor for an infinite life using the Goodman
criterion. Orientation: Use Excel spreadsheets to calculate the theoretical stress concentration factors
and the notch sensitivities parameters.
Bending moment
Torque
203 Nm-
r = 3.5 mm
192 Nm
=38.5 mm
= 35 mm
0 Nm.
-192 Nm.
pulsating cycle
reversed cycle
Transcribed Image Text:tating steel shaft has endurance limit of Se = 343 MPa and ultimate strength of Sut = 627 MPa. A section of the shaft with dimensions is shown in the figure (D=38.5 mm, d = 35 mm, r = 3.5 mm). The section is subjected to a completely reversed bending moment of 192 Nm, accompanied by a torque alternate from 0 to 203 Nm. Calculate the fatigue factor for an infinite life using the Goodman criterion. Orientation: Use Excel spreadsheets to calculate the theoretical stress concentration factors and the notch sensitivities parameters. Bending moment Torque 203 Nm- r = 3.5 mm 192 Nm =38.5 mm = 35 mm 0 Nm. -192 Nm. pulsating cycle reversed cycle
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