Analysis of stress relaxation behaviour with the use of Li-curves
Identifieur interne : 000605 ( Main/Exploration ); précédent : 000604; suivant : 000606Analysis of stress relaxation behaviour with the use of Li-curves
Auteurs : RBID : ISTEX:396_1987_Article_BF01418456.pdfEnglish descriptors
Abstract
A number of theoretical models exist for describing the stress relaxation behaviour of solids with entirely different physical backgrounds. In this communication the potential of the spectral theory, the Williams-Watts function, the theory of stress dependent activation, the power law and a co-operative model to describe experimental relaxation curves are critically examined. The analysis is facilitated by the use of Li-curves, i.e. by plotting the derivative of the stress with regard to log (time) vs. the time dependent stress. The ability of the models to predict the linear character of the flow curves with regard to the initial stress of the relaxation experiments is also examined. The predictions of the theoretical models are compared with experimental results for high density polyethylene, polyisobutylene, indium and steel. From the analysis, it is concluded that the co-operative model appears to be the most useful for describing the stress relaxation behaviour of materials.
DOI: 10.1007/BF01418456
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<record><TEI><teiHeader><fileDesc><titleStmt><title>Analysis of stress relaxation behaviour with the use of Li-curves</title><author><name>C. -G. Ek</name><affiliation wicri:level="1"><mods:affiliation>Department of Polymeric Materials, Chalmers University of Technology, Gothenburg, Sweden</mods:affiliation><country xml:lang="fr">Suède</country><wicri:regionArea>Department of Polymeric Materials, Chalmers University of Technology, Gothenburg</wicri:regionArea><wicri:noRegion>Gothenburg</wicri:noRegion></affiliation></author><author><name>J. Kubát</name><affiliation wicri:level="1"><mods:affiliation>Department of Polymeric Materials, Chalmers University of Technology, Gothenburg, Sweden</mods:affiliation><country xml:lang="fr">Suède</country><wicri:regionArea>Department of Polymeric Materials, Chalmers University of Technology, Gothenburg</wicri:regionArea><wicri:noRegion>Gothenburg</wicri:noRegion></affiliation></author><author><name>M. Rigdahl</name><affiliation wicri:level="1"><mods:affiliation>Department of Polymeric Materials, Chalmers University of Technology, Gothenburg, Sweden</mods:affiliation><country xml:lang="fr">Suède</country><wicri:regionArea>Department of Polymeric Materials, Chalmers University of Technology, Gothenburg</wicri:regionArea><wicri:noRegion>Gothenburg</wicri:noRegion></affiliation></author></titleStmt><publicationStmt><idno type="RBID">ISTEX:396_1987_Article_BF01418456.pdf</idno><date when="1987">1987</date><idno type="doi">10.1007/BF01418456</idno><idno type="wicri:Area/Main/Corpus">000067</idno><idno type="wicri:Area/Main/Curation">000067</idno><idno type="wicri:Area/Main/Exploration">000605</idno></publicationStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Co-operative model</term><term>Flow theories</term><term>Internal stresses</term><term>Li-curves</term><term>Stress relaxation</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="eng">A number of theoretical models exist for describing the stress relaxation behaviour of solids with entirely different physical backgrounds. In this communication the potential of the spectral theory, the Williams-Watts function, the theory of stress dependent activation, the power law and a co-operative model to describe experimental relaxation curves are critically examined. The analysis is facilitated by the use of Li-curves, i.e. by plotting the derivative of the stress with regard to log (time) vs. the time dependent stress. The ability of the models to predict the linear character of the flow curves with regard to the initial stress of the relaxation experiments is also examined. The predictions of the theoretical models are compared with experimental results for high density polyethylene, polyisobutylene, indium and steel. From the analysis, it is concluded that the co-operative model appears to be the most useful for describing the stress relaxation behaviour of materials.</div></front></TEI><mods xsi:schemaLocation="http://www.loc.gov/mods/v3 file:///applis/istex/home/loadistex/home/etc/xsd/mods.xsd" version="3.4" istexId="0c6b64d5761317309000ff5c492db04ad94ac91f"><titleInfo lang="eng"><title>Analysis of stress relaxation behaviour with the use of Li-curves</title></titleInfo><name type="personal"><namePart type="given">C. -G.</namePart><namePart type="family">Ek</namePart><role><roleTerm type="text">author</roleTerm></role><affiliation>Department of Polymeric Materials, Chalmers University of Technology, Gothenburg, Sweden</affiliation></name><name type="personal"><namePart type="given">J.</namePart><namePart type="family">Kubát</namePart><role><roleTerm type="text">author</roleTerm></role><affiliation>Department of Polymeric Materials, Chalmers University of Technology, Gothenburg, Sweden</affiliation></name><name type="personal"><namePart type="given">M.</namePart><namePart type="family">Rigdahl</namePart><role><roleTerm type="text">author</roleTerm></role><affiliation>Department of Polymeric Materials, Chalmers University of Technology, Gothenburg, Sweden</affiliation></name><typeOfResource>text</typeOfResource><genre>Polymer Science</genre><genre>Original Paper</genre><originInfo><publisher>Steinkopff-Verlag, Darmstadt</publisher><dateCreated encoding="w3cdtf">1986-12-08</dateCreated><dateCaptured encoding="w3cdtf">1987-02-27</dateCaptured><dateValid encoding="w3cdtf">2005-03-17</dateValid><copyrightDate encoding="w3cdtf">1987</copyrightDate></originInfo><language><languageTerm type="code" authority="iso639-2b">eng</languageTerm></language><physicalDescription><internetMediaType>text/html</internetMediaType></physicalDescription><abstract lang="eng">A number of theoretical models exist for describing the stress relaxation behaviour of solids with entirely different physical backgrounds. In this communication the potential of the spectral theory, the Williams-Watts function, the theory of stress dependent activation, the power law and a co-operative model to describe experimental relaxation curves are critically examined. The analysis is facilitated by the use of Li-curves, i.e. by plotting the derivative of the stress with regard to log (time) vs. the time dependent stress. The ability of the models to predict the linear character of the flow curves with regard to the initial stress of the relaxation experiments is also examined. The predictions of the theoretical models are compared with experimental results for high density polyethylene, polyisobutylene, indium and steel. From the analysis, it is concluded that the co-operative model appears to be the most useful for describing the stress relaxation behaviour of materials.</abstract><subject lang="eng"><genre>Key words</genre><topic>Stress relaxation</topic><topic>flow theories</topic><topic>Li-curves</topic><topic>internal stresses</topic><topic>co-operative model</topic></subject><relatedItem type="series"><titleInfo type="abbreviated"><title>Colloid & Polymer Sci</title></titleInfo><titleInfo><title>Colloid and Polymer Science</title><subTitle>Kolloid-Zeitschrift und Zeitschrift für Polymere.</subTitle><partNumber>Year: 1987</partNumber><partNumber>Volume: 265</partNumber><partNumber>Number: 9</partNumber></titleInfo><genre>Archive Journal</genre><originInfo><dateIssued encoding="w3cdtf">1987-09-01</dateIssued><copyrightDate encoding="w3cdtf">1987</copyrightDate></originInfo><subject usage="primary"><topic>Chemistry</topic><topic>Physical Chemistry</topic><topic>Polymer Sciences</topic><topic>Industrial Chemistry/Chemical Engineering</topic><topic>Condensed Matter</topic></subject><identifier type="issn">0303-402X</identifier><identifier type="issn">Electronic: 1435-1536</identifier><identifier type="matrixNumber">396</identifier><identifier type="local">IssueArticleCount: 13</identifier><recordInfo><recordOrigin>Steinkopff, 1987</recordOrigin></recordInfo></relatedItem><identifier type="doi">10.1007/BF01418456</identifier><identifier type="matrixNumber">Art6</identifier><identifier type="local">BF01418456</identifier><accessCondition type="use and reproduction">MetadataGrant: OpenAccess</accessCondition><accessCondition type="use and reproduction">AbstractGrant: OpenAccess</accessCondition><accessCondition type="restriction on access">BodyPDFGrant: Restricted</accessCondition><accessCondition type="restriction on access">BodyHTMLGrant: Restricted</accessCondition><accessCondition type="restriction on access">BibliographyGrant: Restricted</accessCondition><accessCondition type="restriction on access">ESMGrant: Restricted</accessCondition><part><extent unit="pages"><start>803</start><end>809</end></extent></part><recordInfo><recordOrigin>Steinkopff, 1987</recordOrigin><recordIdentifier>396_1987_Article_BF01418456.pdf</recordIdentifier></recordInfo></mods></record>Pour manipuler ce document sous Unix (Dilib)
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