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Determination of residual stresses utilizing the the variation of hardness at elastic-plastic indentation
KTH, School of Engineering Sciences (SCI), Solid Mechanics (Dept.), Solid Mechanics (Div.).ORCID iD: 0000-0001-6232-8819
2019 (English)In: Journal of Testing and Evaluation, ISSN 0090-3973, E-ISSN 1945-7553, ISSN 0090-3973, Vol. 47, no 4, p. 3174-3184Article in journal (Refereed) Published
Abstract [en]

Material hardness is independent of residual stresses at predominantly plastic deformation in the region of contact between an indenter and the material. This is an important fact, as such a situation is relevant for most metals and alloys. It has, however, been established that when elastic and plastic deformations are of equal magnitude, this independence is lost. This fact complicates residual stress determination in such a situation, pertinent to materials such as ceramics and polymers, but it also provides additional important information for performing such a task in an accurate manner. Presently, a relevant formula for taking advantage of this information is presented. The formula is based on previous results pertinent to indentation analyses of stress-free materials. The predictions are compared to finite element results from previous studies describing cone indentation of materials with residual stresses. The analysis is restricted to classical elastoplasticity.

Place, publisher, year, edition, pages
West Conshohocken, Pennsylvania USA, 2019. Vol. 47, no 4, p. 3174-3184
National Category
Applied Mechanics
Research subject
Solid Mechanics
Identifiers
URN: urn:nbn:se:kth:diva-258410DOI: 10.1520/JTE20170525ISI: 000483199800050Scopus ID: 2-s2.0-85065673202OAI: oai:DiVA.org:kth-258410DiVA, id: diva2:1349950
Note

QC 20190926

Available from: 2019-09-10 Created: 2019-09-10 Last updated: 2019-09-26Bibliographically approved

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Larsson, Per-Lennart

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