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Article: Thermally activated model for tensile yielding of pristine single-walled carbon nanotubes with nonlinear elastic deformation

TitleThermally activated model for tensile yielding of pristine single-walled carbon nanotubes with nonlinear elastic deformation
Authors
Issue Date2009
PublisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/carbon
Citation
Carbon, 2009, v. 47 n. 8, p. 2070-2076 How to Cite?
AbstractA thermally activated model for evaluating the tensile yield strain of pristine single-walled carbon nanotubes (SWCNTs) is established. Using a parabolic function to accurately describe the dependence of stress on strain, we derive a yield function relating the yield strain to temperature, strain rate and tube length. The activation energy and activation area are then determined from the MD results of the tensile yield strain as a function of temperature. We find that the activation energies for armchair SWCNTs range from 7.18 to 11.94 eV, depending on the radius of SWCNTs. Analyses of activation area and MD results reveal that the nucleation of a critical defect, which leads to the failure of SWCNTs, grows from a single bond size at 300 K to almost twice the size at 2100 K. On the basis of activation parameters, our model can be used to predict the yield strain of SWCNTs under experimental conditions. © 2009 Elsevier Ltd. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/58997
ISSN
2015 Impact Factor: 6.198
2015 SCImago Journal Rankings: 2.109
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorWen, Men_HK
dc.contributor.authorAn, Ben_HK
dc.contributor.authorFukuyama, Sen_HK
dc.contributor.authorYokogawa, Ken_HK
dc.contributor.authorNgan, AHWen_HK
dc.date.accessioned2010-05-31T03:41:08Z-
dc.date.available2010-05-31T03:41:08Z-
dc.date.issued2009en_HK
dc.identifier.citationCarbon, 2009, v. 47 n. 8, p. 2070-2076en_HK
dc.identifier.issn0008-6223en_HK
dc.identifier.urihttp://hdl.handle.net/10722/58997-
dc.description.abstractA thermally activated model for evaluating the tensile yield strain of pristine single-walled carbon nanotubes (SWCNTs) is established. Using a parabolic function to accurately describe the dependence of stress on strain, we derive a yield function relating the yield strain to temperature, strain rate and tube length. The activation energy and activation area are then determined from the MD results of the tensile yield strain as a function of temperature. We find that the activation energies for armchair SWCNTs range from 7.18 to 11.94 eV, depending on the radius of SWCNTs. Analyses of activation area and MD results reveal that the nucleation of a critical defect, which leads to the failure of SWCNTs, grows from a single bond size at 300 K to almost twice the size at 2100 K. On the basis of activation parameters, our model can be used to predict the yield strain of SWCNTs under experimental conditions. © 2009 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/carbonen_HK
dc.relation.ispartofCarbonen_HK
dc.titleThermally activated model for tensile yielding of pristine single-walled carbon nanotubes with nonlinear elastic deformationen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0008-6223&volume=47&spage=2070&epage=2076&date=2009&atitle=Thermally+activated+model+for+tensile+yielding+of+pristine+single-walled+carbon+nanotubes+with+nonlinear+elastic+deformationen_HK
dc.identifier.emailNgan, AHW:hwngan@hkucc.hku.hken_HK
dc.identifier.authorityNgan, AHW=rp00225en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.carbon.2009.03.065en_HK
dc.identifier.scopuseid_2-s2.0-67349236638en_HK
dc.identifier.hkuros155590en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-67349236638&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume47en_HK
dc.identifier.issue8en_HK
dc.identifier.spage2070en_HK
dc.identifier.epage2076en_HK
dc.identifier.isiWOS:000266855800023-
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridWen, M=7102904680en_HK
dc.identifier.scopusauthoridAn, B=7007154125en_HK
dc.identifier.scopusauthoridFukuyama, S=7005814763en_HK
dc.identifier.scopusauthoridYokogawa, K=7004856036en_HK
dc.identifier.scopusauthoridNgan, AHW=7006827202en_HK

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