Characterisation of the fracture energy and toughening mechanisms of a nano-toughened epoxy adhesive

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Title: Characterisation of the fracture energy and toughening mechanisms of a nano-toughened epoxy adhesive
Authors: McAuliffe, David
Karac, Aleksandar
Murphy, Neal
et al.
Permanent link: http://hdl.handle.net/10197/4691
Date: Sep-2011
Abstract: In this study the adhesive joint fracture behaviour of a nano-toughened epoxy adhesive was investigated. Two experimental test methods were used; (i) the standard tapered double cantilever beam (TDCB) test to measure the mode I adhesive joint fracture energy, GIC, as a function of bond gap thickness and (ii) a circumferentially deep notched tensile test to determine the cohesive strength of the adhesive for a range of constraint levels. It was found that the fracture energy of the adhesive followed the well-known bond gap thickness dependency [1]. SEM analysis of the TDCB fracture surfaces revealed significant plastic void growth. Finally, numerical modelling of the experimental tests suggested that most of the fracture energy was dissipated via highly localised plasticity in the fracture process zone ahead of the crack tip.
Type of material: Journal Article
Publisher: Trans Tech Publications
Copyright (published version): 2011 Trans Tech Publications
Keywords: Adhesive jointsToughening mechanismsNano-particles
DOI: 10.4028/www.scientific.net/KEM.488-489.573
Language: en
Status of Item: Peer reviewed
Appears in Collections:Mechanical & Materials Engineering Research Collection

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