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  • Effect of the amount of cork particles on the strength and glass transition temperature of a structural adhesive

    Author(s)
    Barbosa, AQ
    Silva, LFM
    ÿchsner, A
    Griffith University Author(s)
    Oechsner, Andreas
    Year published
    2014
    Metadata
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    Abstract
    The inclusion of particles (micro or nano) is a method to improve the mechanical properties, such as toughness, of structural adhesives. Structural adhesives are known for their high strength and stiffness but also for their low ductility and toughness. There are many processes described in the literature to increase the toughness, the use of rubber particles being one of the most common processes. In the present study, natural micro particles of cork were used with the objective to increase the ductility of a brittle epoxy adhesive. The idea is for the cork particles to act like a crack stopper. The influence of the amount ...
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    The inclusion of particles (micro or nano) is a method to improve the mechanical properties, such as toughness, of structural adhesives. Structural adhesives are known for their high strength and stiffness but also for their low ductility and toughness. There are many processes described in the literature to increase the toughness, the use of rubber particles being one of the most common processes. In the present study, natural micro particles of cork were used with the objective to increase the ductility of a brittle epoxy adhesive. The idea is for the cork particles to act like a crack stopper. The influence of the amount of cork particles was studied. Particles of cork ranging in size from 125 to 250 孠were mixed in the epoxy adhesive Araldite 2020 from Huntsman. The amount of cork in the adhesive was varied between 0.5% and 5% in weight. This evaluation was made using tensile tests and it was evident that the failure strain was related to the amount of cork particles in the resin. The results concerning the single lap joints and the glass transition temperature confirm the increased ductility obtained in the tensile tests.
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    Journal Title
    Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials Design and Applications
    Volume
    228
    Issue
    4
    DOI
    https://doi.org/10.1177/1464420713493581
    Subject
    Numerical Modelling and Mechanical Characterisation
    Materials Engineering
    Publication URI
    http://hdl.handle.net/10072/63936
    Collection
    • Journal articles

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