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Generic failure mechanisms in adhesive bonds
-
Philipp Hass
,
Falk K. Wittel
Published/Copyright:
September 4, 2012
Abstract
The failure of adhesive bondlines has been studied at the microscopic level via tensile tests. Stable crack propagation could be generated by means of samples with improved geometry, which made in situ observations possible. The interaction of cracks with adhesive bondlines under various angles to the crack propagation was the focus of this study, as well as the respective loading situations for the adhesives urea formaldehyde (UF), polyurethane (PUR), and polyvinyl acetate (PVAc), which have distinctly different mechanical behaviors. It has been shown how adhesive properties influence the occurrence of certain failure mechanisms and determine their appearance and order of magnitude. With the observed failure mechanisms, it becomes possible to predict the propagation path of a crack through the specimen.
Received: 2011-12-14
Accepted: 2012-8-10
Published Online: 2012-09-04
Published in Print: 2013-02-01
©2013 by Walter de Gruyter Berlin Boston
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- Original Articles
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- Behavior of xylans from the Eucalyptus species. Part 2. Characterization of 4-O-methylglucuronoxylans isolated from black liquors of kraft pulping of Eucalyptus grandis and E. urophylla
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