4. A beam has fluctuating bending moment and is not rotating. The bending moment has a maximum of 1kNm anda minimum of 100kNm. The beam is made of AISI1020CD steel with a square cross section. There are no stressconcentrations.a. Determine the fully corrected endurance limit as a function of the cross section (cross section unknown)b. Determine the required size for a factor of safety of 2 using the Gerber Fatigue Failure Theory

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A beam has fluctuating bending moment and is not rotating. The bending moment has a maximum of 1kNm and a minimum of 100kNm. The beam is made of AISI1020CD steel with a square cross section. There are no stress concentrations.

A beam has fluctuating bending moment and is not rotating. The bending moment has a maximum of 1kNm and a minimum of 100kNm. The beam is made of AISI1020CD steel with a square cross section. There are no stress concentrations.

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 3.11.5P: A square tube section has side dimension of 20 in. arid thickness of 0.5 in. If the section is used...

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Question

4. A beam has fluctuating bending moment and is not rotating. The bending moment has a maximum of 1kNm and
a minimum of 100kNm. The beam is made of AISI1020CD steel with a square cross section. There are no stress
concentrations.
a. Determine the fully corrected endurance limit as a function of the cross section (cross section unknown)
b. Determine the required size for a factor of safety of 2 using the Gerber Fatigue Failure Theory

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