An evaluation of the temperature dependence of cohesive properties for two structural epoxy adhesives
2012 (English)In: 19th European Conference on Fracture, Kazan Scientific Centre of the Russian Academy of Sciences , 2012Conference paper (Refereed)
Cohesive modelling provides a more detailed understanding of the fracture properties of adhesivejoints than provided by linear elastic fracture mechanics. A cohesive model is characterized by astress-deformation relation of the adhesive layer. This relation can be measured experimentally.Two parameters of the stress-deformation relation are of special importance; the area under thecurve, which equals the fracture energy, and the peak stress. The influence of temperature of theseparameters is analyses experimentally and evaluated statistically for two structural epoxy adhesivesin the span from of -40°C to +80°C. The adhesives are used by the automotive industry and atemperature span below the glass transition temperature is considered. The results show that thattemperature has a modest influence on the adhesives Mode I fracture energy. For one of theadhesives, the fracture energy is independent of the temperature in the evaluated temperature span.In mode II, the influence of temperature is larger. The peak stresses decreases almost linearly withan increasing temperature in both loading cases and for both adhesives.
Place, publisher, year, edition, pages
Kazan Scientific Centre of the Russian Academy of Sciences , 2012.
Double cantilever beam, End notched flexure, Fracture energy, Kruskal-Wallis test, Peak stress, Regression analyses.
Research subject Technology
IdentifiersURN: urn:nbn:se:his:diva-6400ISBN: 978-5-905576-18-8OAI: oai:DiVA.org:his-6400DiVA: diva2:553362
19th European Conference on Fracture, Kazan, Russia, Aug. 26-31 2012