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Residual surface stress by localized contact-creep

Published online by Cambridge University Press:  31 January 2011

Sujanto Widjaja
Affiliation:
Department of Mechanical Engineering, University of Massachusetts, Amherst, Massachusetts 01003–2210
Karl Jakus*
Affiliation:
Department of Mechanical Engineering, University of Massachusetts, Amherst, Massachusetts 01003–2210
Revti Atri
Affiliation:
Department of Mechanical Engineering, University of Massachusetts, Amherst, Massachusetts 01003–2210
John E. Ritter
Affiliation:
Department of Mechanical Engineering, University of Massachusetts, Amherst, Massachusetts 01003–2210
Sandeepan Bhattacharya
Affiliation:
Department of Mechanical Engineering, University of Massachusetts, Amherst, Massachusetts 01003–2210
*
a)Address all correspondence to this author.
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Abstract

When a ceramic material creeps under a localized stress and then cools under load, a portion of the creep flow stress is retained as a residual compressive stress due to elastic rebound being constrained by the creep zone. Localized contact-creep was used to generate residual compressive surface stress in soda-lime glass and two sintered aluminas. The Vickers indentation technique was used to measure the residual stress within the contact-creep area. Alumina with a higher elastic modulus than glass retained higher residual compressive surface stress. The results were in reasonable agreement with the predicted stress distribution given by finite element analysis.

Type
Articles
Copyright
Copyright © Materials Research Society 1997

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References

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