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Article: Correcting power-law viscoelastic effects in elastic modulus measurement using depth-sensing indentation

TitleCorrecting power-law viscoelastic effects in elastic modulus measurement using depth-sensing indentation
Authors
KeywordsCreep
Elasticity
Hardness testing
Mechanical properties
Nanoindentation
Issue Date2005
PublisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/ijsolstr
Citation
International Journal Of Solids And Structures, 2005, v. 42 n. 5-6, p. 1831-1846 How to Cite?
AbstractThe standard Oliver - Pharr method for measuring the elastic modulus by depth-sensing indentation makes use of the unloading response of the material as it is assumed that the unloading behaviour is purely elastic. However, under certain conditions, the unloading behaviour can be viscoelastic, and if the viscosity effects are not corrected, the calculated modulus can be seriously erroneous. Feng and Ngan have proposed a correction formula which can eliminate the creep effects. However, this formula has been proven to be correct for the case of linear viscoelasticity only; the general case of power-law viscoelasticity has not been proven. In this paper, this formula is proved for the general power-law viscoelastic situation using a Maxwell material model. Finite-element calculations are also performed to illustrate the result. The correction formula is applied to experimental data on amorphous selenium at ambient and elevated temperatures and is found to be effective in correcting for creep effects which are very prominent in this material. © 2004 Elsevier Ltd. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/76108
ISSN
2015 Impact Factor: 2.081
2015 SCImago Journal Rankings: 1.597
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorNgan, AHWen_HK
dc.contributor.authorWang, HTen_HK
dc.contributor.authorTang, Ben_HK
dc.contributor.authorSze, KYen_HK
dc.date.accessioned2010-09-06T07:17:43Z-
dc.date.available2010-09-06T07:17:43Z-
dc.date.issued2005en_HK
dc.identifier.citationInternational Journal Of Solids And Structures, 2005, v. 42 n. 5-6, p. 1831-1846en_HK
dc.identifier.issn0020-7683en_HK
dc.identifier.urihttp://hdl.handle.net/10722/76108-
dc.description.abstractThe standard Oliver - Pharr method for measuring the elastic modulus by depth-sensing indentation makes use of the unloading response of the material as it is assumed that the unloading behaviour is purely elastic. However, under certain conditions, the unloading behaviour can be viscoelastic, and if the viscosity effects are not corrected, the calculated modulus can be seriously erroneous. Feng and Ngan have proposed a correction formula which can eliminate the creep effects. However, this formula has been proven to be correct for the case of linear viscoelasticity only; the general case of power-law viscoelasticity has not been proven. In this paper, this formula is proved for the general power-law viscoelastic situation using a Maxwell material model. Finite-element calculations are also performed to illustrate the result. The correction formula is applied to experimental data on amorphous selenium at ambient and elevated temperatures and is found to be effective in correcting for creep effects which are very prominent in this material. © 2004 Elsevier Ltd. All rights reserved.en_HK
dc.languageengen_HK
dc.publisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/ijsolstren_HK
dc.relation.ispartofInternational Journal of Solids and Structuresen_HK
dc.subjectCreepen_HK
dc.subjectElasticityen_HK
dc.subjectHardness testingen_HK
dc.subjectMechanical propertiesen_HK
dc.subjectNanoindentationen_HK
dc.titleCorrecting power-law viscoelastic effects in elastic modulus measurement using depth-sensing indentationen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0020-7683&volume=42&issue=5-6&spage=1831&epage=1846&date=2005&atitle=Correcting+power-law+viscoelastic+effects+in+elastic+modulus+measurement+using+depth-sensing+indentationen_HK
dc.identifier.emailNgan, AHW: hwngan@hkucc.hku.hken_HK
dc.identifier.emailTang, B: tangbin@hkucc.hku.hken_HK
dc.identifier.emailSze, KY: kysze@hku.hken_HK
dc.identifier.authorityNgan, AHW=rp00225en_HK
dc.identifier.authorityTang, B=rp00081en_HK
dc.identifier.authoritySze, KY=rp00171en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.ijsolstr.2004.07.018en_HK
dc.identifier.scopuseid_2-s2.0-9944223661en_HK
dc.identifier.hkuros97623en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-9944223661&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume42en_HK
dc.identifier.issue5-6en_HK
dc.identifier.spage1831en_HK
dc.identifier.epage1846en_HK
dc.identifier.isiWOS:000226257700029-
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridNgan, AHW=7006827202en_HK
dc.identifier.scopusauthoridWang, HT=7501734920en_HK
dc.identifier.scopusauthoridTang, B=24554184100en_HK
dc.identifier.scopusauthoridSze, KY=7006735060en_HK
dc.identifier.citeulike6980296-

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