A 1040 steel has been heat-treated to a yield stress of 900 MPa and a tensile yield strength of 1330 MPa. The endurance limit (at 10° cycles for cyclical loading about a zero mean stress) is quoted as 620 MPa. Your company is considering using this steel, with the same heat treatment, for an application in which fatigue may occur during cyclic loading with R=0. Your boss is considering shot-peening the steel to induce residual compressive stresses in the surface. Can the endurance limit be raised this way? If so, by how much? Discuss this problem with reference to the Goodman diagram using any relevant calculation(s). 5.
A 1040 steel has been heat-treated to a yield stress of 900 MPa and a tensile yield strength of 1330 MPa. The endurance limit (at 10° cycles for cyclical loading about a zero mean stress) is quoted as 620 MPa. Your company is considering using this steel, with the same heat treatment, for an application in which fatigue may occur during cyclic loading with R=0. Your boss is considering shot-peening the steel to induce residual compressive stresses in the surface. Can the endurance limit be raised this way? If so, by how much? Discuss this problem with reference to the Goodman diagram using any relevant calculation(s). 5.
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:A 1040 steel has been heat-treated to a yield stress of 900 MPa and a tensile yield
strength of 1330 MPa. The endurance limit (at 10° cycles for cyclical loading
about a zero mean stress) is quoted as 620 MPa. Your company is considering
using this steel, with the same heat treatment, for an application in which fatigue
may occur during cyclic loading with R=0. Your boss is considering shot-peening
the steel to induce residual compressive stresses in the surface. Can the endurance
limit be raised this way? If so, by how much? Discuss this problem with reference
to the Goodman diagram using any relevant calculation(s).
5.
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