Problem 3: A hot rolled steel shaft is subjected to a torsional load that varies from 3000 in-lb clockwise to 1000 in-1b counterclockwise as an applied bending moment at a critical section varies from + 4000 in-lb to 2000 in-lb. The shaft is of uniform cross section and no keyway is present at the critical sec- tion. Determine the required shaft diameter. The material has an ultimate strength of 80,000 psi and a yield strength of 60,000 psi. Base design on a factor of safety N=1.5. Take the endurance limit as half the ultimate strength.

Problem 3: A hot rolled steel shaft is subjected to a torsional load that varies from 3000 in-lb clockwise to 1000 in-1b counterclockwise as an applied bending moment at a critical section varies from + 4000 in-lb to 2000 in-lb. The shaft is of uniform cross section and no keyway is present at the critical sec- tion. Determine the required shaft diameter. The material has an ultimate strength of 80,000 psi and a yield strength of 60,000 psi. Base design on a factor of safety N=1.5. Take the endurance limit as half the ultimate strength.

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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Concept explainers

Torsion

In mechanical engineering, torque, torsion, and twisting moment are three of the most important concepts which have different meanings. Torque is the consequence of a moment of a force that produces an angular acceleration in a body or induces rotational kinetic energy in a body. For instance, in an automobile, the power transmission shaft is a body that is always under rotation due to the external torque acting on it, this torque is created by the engine.

Question

Problem 3:
A hot rolled steel shaft is subjected to a torsional load that varies from 3000 in-lb clockwise to
1000 in-lb counterclockwise as an applied bending moment at a critical section varies from + 4000 in-lb
to 2000 in-lb. The shaft is of uniform cross section and no keyway is present at the critical sec-
tion. Determine the required shaft diameter. The material has an ultimate strength of 80,000 psi
and a yield strength of 60,000 psi. Base design on a factor of safety N=1.5. Take the endurance
limit as half the ultimate strength.

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