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dc.contributor.author
Knorz, Markus
dc.contributor.author
Niemz, Peter
dc.contributor.author
van de Kuilen, Jan-Willem G.
dc.date.accessioned
2021-05-01T05:28:35Z
dc.date.available
2017-06-12T01:32:05Z
dc.date.available
2021-05-01T05:28:35Z
dc.date.issued
2016-02-01
dc.identifier.issn
0018-3830
dc.identifier.issn
1437-434X
dc.identifier.other
10.1515/hf-2014-0324
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/113409
dc.identifier.doi
10.3929/ethz-b-000113409
dc.description.abstract
Structural wood-adhesive bonds (WAB) have to be durable while subjected to considerable stresses caused by mechanical loads and moisture content changes. To better understand the moisture-related durability of WABs, knowledge is important of how moisture changes generate strain in the bond. In this paper, strain on end-grain surfaces of bonded ash specimens was analyzed by means of digital image correlation. Strains were generated by wood shrinkage, and the evaluation was focused on shear strain (SStr). The bond lines were studied depending on the adhesive type – phenol resorcinol formaldehyde (PRF), melamine urea formaldehyde (MUF), polyurethane (PUR), and emulsion polymer isocyanates (EPI). Moreover, three different glueline (GL) thicknesses of MUF were taken into consideration. Comparing the adhesive types, SStr distributions (SStrD) were strongly influenced by adhesive elasticity. MUF and PRF bonds were quite rigid and were associated with pronounced strain amplitudes in and close to the GL together with strain dissipation reaching deep in the wood. PUR and EPI adhesives were more elastic and therefore allowed for smoother strain transition showing less distinct strain peaks. GL thickness had significant impact on SStrD. A high strain level and direct strain transition between adherends was found for the 0.01 mm GL, whereas a pronounced strain decrease was observed in the 0.1 and 0.2 mm GLs. This indicates different stress levels in the wood-adhesive interface dependent on GL thickness.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
De Gruyter
en_US
dc.rights.uri
http://rightsstatements.org/page/InC-NC/1.0/
dc.subject
Adhesive
en_US
dc.subject
Ash
en_US
dc.subject
Digital image correlation
en_US
dc.subject
EPI
en_US
dc.subject
Glueline thickness
en_US
dc.subject
Moisture-induced strain
en_US
dc.subject
MUF
en_US
dc.subject
PRF
en_US
dc.subject
PUR
en_US
dc.title
Measurement of moisture-related strain in bonded ash depending on adhesive type and glueline thickness
en_US
dc.type
Journal Article
dc.rights.license
In Copyright - Non-Commercial Use Permitted
dc.date.published
2015-04-14
ethz.journal.title
Holzforschung
ethz.journal.volume
70
en_US
ethz.journal.issue
2
en_US
ethz.pages.start
145
en_US
ethz.pages.end
155
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.notes
It was possible to publish this article open access thanks to a Swiss National Licence with the publisher.
en_US
ethz.identifier.wos
ethz.identifier.scopus
ethz.publication.place
Berlin
en_US
ethz.publication.status
published
en_US
ethz.date.deposited
2017-06-12T01:34:23Z
ethz.source
ECIT
ethz.identifier.importid
imp5936542747bf615535
ethz.ecitpid
pub:175100
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2017-07-13T12:49:05Z
ethz.rosetta.lastUpdated
2022-03-29T06:59:15Z
ethz.rosetta.exportRequired
true
ethz.rosetta.versionExported
true
ethz.COinS
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