Please use this identifier to cite or link to this item: https://doi.org/10.15480/882.990
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dc.contributor.authorAng, Siang Fung-
dc.contributor.authorSchulz, Anja-
dc.contributor.authorPacher Fernandes, Rodrigo-
dc.contributor.authorSchneider, Gerold A.-
dc.date.accessioned2011-02-14T14:47:56Zde_DE
dc.date.available2011-02-14T14:47:56Zde_DE
dc.date.issued2011-04-
dc.identifier.citationJournal of the mechanical behavior of biomedical materials ; 4.2011, pp. 423-432de_DE
dc.identifier.issn1878-0180de_DE
dc.identifier.other646259407de_DE
dc.identifier.urihttp://tubdok.tub.tuhh.de/handle/11420/992-
dc.description.abstractIn previous studies, enamel showed indications to occlude small cracks in-vivo and exhibited R-curve behaviors for bigger cracks ex-vivo. This study quantifies the crack tip toughness (KI0, KIII0), the crack closure stress and the cohesive zone size at the crack tip of enamel and investigates the toughening mechanisms near the crack tip down to the length scale of a single enamel crystallite. The crack-opening-displacement (COD) profile of cracks induced by Vickers indents on mature bovine enamel was studied using atomic force microscopy (AFM). The mode I crack tip toughness KI0 of cracks along enamel rod boundaries and across enamel rods exhibit similar range of values: KI0,Ir=0.5-1.6MPa.m0.5 (based on Irwin’s ‘nearfield’ solution) and KI0,cz=0.8-1.5MPa.m0.5 (based on the cohesive zone solution of the Dugdale-Muskhelishvili (DM) crack model). The mode III crack tip toughness KIII0,Ir was computed as 0.02-0.15MPa.m0.5. The crack-closure stress at the crack tip was computed as 163-770MPa with a cohesive zone length and width 1.6-10.1μm and 24-44nm utilizing the cohesive zone solution. Toughening elements were observed under AFM and SEM: crack bridging due to protein ligament and hydroxyapatite fibres (micro- and nanometer scale) as well as microcracks were identified.en
dc.language.isoende_DE
dc.relation.ispartofJournal of the mechanical behavior of biomedical materialsde_DE
dc.rightsinfo:eu-repo/semantics/openAccessde_DE
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/de_DE
dc.subjectWerkstoffoberflächeneigenschaftende_DE
dc.subjectenamelde_DE
dc.subjectcrack tip toughnessde_DE
dc.subjectcohesive zonede_DE
dc.subjecthierarchical structurede_DE
dc.subjecttoughening mechanismsde_DE
dc.subject.ddc670: Industrielle Fertigungde_DE
dc.titleSub-10-micrometer toughening and crack tip toughness of dental enamelde_DE
dc.typeArticlede_DE
dc.date.updated2011-02-14T15:21:03Zde_DE
dc.identifier.urnurn:nbn:de:101:1-201505273155-
dc.identifier.doi10.15480/882.990-
dc.type.diniarticle-
dc.subject.bcl51.30:Werkstoffprüfung, Werkstoffuntersuchungde
dc.subject.bcl51.32:Werkstoffmechanikde
dc.subject.gndZahnschmelzde
dc.subject.bclcode51.32-
dc.subject.bclcode51.30-
dc.subject.ddccode570-
dc.subject.ddccode670-
dcterms.DCMITypeText-
tuhh.identifier.urnurn:nbn:de:101:1-201505273155-
tuhh.publikation.typworkingPaperde_DE
tuhh.opus.id1083de_DE
tuhh.gvk.ppn646259407de_DE
tuhh.oai.showtruede_DE
dc.identifier.hdl11420/992-
tuhh.abstract.englishIn previous studies, enamel showed indications to occlude small cracks in-vivo and exhibited R-curve behaviors for bigger cracks ex-vivo. This study quantifies the crack tip toughness (KI0, KIII0), the crack closure stress and the cohesive zone size at the crack tip of enamel and investigates the toughening mechanisms near the crack tip down to the length scale of a single enamel crystallite. The crack-opening-displacement (COD) profile of cracks induced by Vickers indents on mature bovine enamel was studied using atomic force microscopy (AFM). The mode I crack tip toughness KI0 of cracks along enamel rod boundaries and across enamel rods exhibit similar range of values: KI0,Ir=0.5-1.6MPa.m0.5 (based on Irwin’s ‘nearfield’ solution) and KI0,cz=0.8-1.5MPa.m0.5 (based on the cohesive zone solution of the Dugdale-Muskhelishvili (DM) crack model). The mode III crack tip toughness KIII0,Ir was computed as 0.02-0.15MPa.m0.5. The crack-closure stress at the crack tip was computed as 163-770MPa with a cohesive zone length and width 1.6-10.1μm and 24-44nm utilizing the cohesive zone solution. Toughening elements were observed under AFM and SEM: crack bridging due to protein ligament and hydroxyapatite fibres (micro- and nanometer scale) as well as microcracks were identified.de_DE
tuhh.publisher.doi10.1016/j.jmbbm.2010.12.003-
tuhh.publication.instituteKeramische Hochleistungswerkstoffe M-9de_DE
tuhh.identifier.doi10.15480/882.990-
tuhh.type.opus(wissenschaftlicher) Artikel-
tuhh.contributor.originatorInstitut für Keramische Hochleistungswerkstoffede
tuhh.institute.germanKeramische Hochleistungswerkstoffe M-9de
tuhh.institute.englishAdvanced Ceramics M-9en
tuhh.institute.id56de_DE
tuhh.type.id17de_DE
tuhh.gvk.hasppntrue-
tuhh.hasurnfalse-
dc.type.driverarticle-
dc.identifier.oclc930768936-
dc.type.casraiJournal Article-
tuhh.container.issue3de_DE
tuhh.container.volume4de_DE
tuhh.container.startpage423de_DE
tuhh.container.endpage432de_DE
dc.relation.projectUntersuchung des Deformations- und Bruchverhaltens der hierarchischen Ebenen von Zahnschmelzde_DE
dc.rights.nationallicensefalsede_DE
dc.identifier.scopus2-s2.0-79751530164-
local.status.inpressfalsede_DE
datacite.resourceTypeJournal Article-
datacite.resourceTypeGeneralText-
item.creatorOrcidAng, Siang Fung-
item.creatorOrcidSchulz, Anja-
item.creatorOrcidPacher Fernandes, Rodrigo-
item.creatorOrcidSchneider, Gerold A.-
item.grantfulltextopen-
item.creatorGNDAng, Siang Fung-
item.creatorGNDSchulz, Anja-
item.creatorGNDPacher Fernandes, Rodrigo-
item.creatorGNDSchneider, Gerold A.-
item.mappedtypeArticle-
item.openairecristypehttp://purl.org/coar/resource_type/c_6501-
item.fulltextWith Fulltext-
item.cerifentitytypePublications-
item.languageiso639-1en-
item.openairetypeArticle-
crisitem.project.funderDeutsche Forschungsgemeinschaft (DFG)-
crisitem.project.funderid501100001659-
crisitem.project.funderrorid018mejw64-
crisitem.project.grantnoSCHN 372/18-2-
crisitem.author.deptKeramische Hochleistungswerkstoffe M-9-
crisitem.author.deptKeramische Hochleistungswerkstoffe M-9-
crisitem.author.deptKeramische Hochleistungswerkstoffe M-9-
crisitem.author.orcid0000-0001-5780-6249-
crisitem.author.parentorgStudiendekanat Maschinenbau-
crisitem.author.parentorgStudiendekanat Maschinenbau-
crisitem.author.parentorgStudiendekanat Maschinenbau-
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