4. A 25 mm diameter steel rotating shaft in a machine is loaded as follows: $ = 25mm Rotating M T With M = 400 Nm, N = 250 N, T = 350 Nm. The steel has the following material properties: SUT = 420 MPa, Sy = 350 MPa a) Sketch the vs. t plot and the T vs. t plot. b) Find dem and Tea. If the shaft operates under 100 °C, is machined, and requires a reliability of 90%. c) What is the safety factor for infinite life if the load increases proportionally? d) How many cycles would it last for? Or does it fail because of static failure? Make sure you sketch the appropriate material fatigue failure diagram(s). Be sure to include numerical values, units, and label axes.
4. A 25 mm diameter steel rotating shaft in a machine is loaded as follows: $ = 25mm Rotating M T With M = 400 Nm, N = 250 N, T = 350 Nm. The steel has the following material properties: SUT = 420 MPa, Sy = 350 MPa a) Sketch the vs. t plot and the T vs. t plot. b) Find dem and Tea. If the shaft operates under 100 °C, is machined, and requires a reliability of 90%. c) What is the safety factor for infinite life if the load increases proportionally? d) How many cycles would it last for? Or does it fail because of static failure? Make sure you sketch the appropriate material fatigue failure diagram(s). Be sure to include numerical values, units, and label axes.
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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Transcribed Image Text:4. A 25 mm diameter steel rotating shaft in a machine is loaded as follows:
= 25mm.
Rotating
With M = 400 Nm, N = 250 N, T = 350 Nm.
The steel has the following material properties: SUT =
M
420 MPa, Sy = 350 MPa
a) Sketch the a vs. t plot and the T vs. t plot.
b) Find dem and Tea.
If the shaft operates under 100 °C, is machined, and requires a reliability of 90%.
c) What is the safety factor for infinite life if the load increases proportionally?
d) How many cycles would it last for? Or does it fail because of static failure?
Make sure you sketch the appropriate material fatigue failure diagram(s). Be sure to include numerical
values, units, and label axes.
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