Abstract
Rubber toughened epoxies are used in a wide range of applications including adhesives when toughness is a crucial property. It is well known that the cavitation of the rubber particles is an important process to optimise the toughness of such materials. This article describes the development of a predictive model to describe the dependence of rubber particle cavitation on particle size. The model is developed using a combination of experimental observations and finite element simulations. Predictions have been obtained for both uniaxial loading conditions and the triaxial loading conditions expected ahead of a crack. The model has been extended to consider the cavitation of nano-sized ‘rubber’ particles.
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Acknowledgements
This project was jointly funded by the Engineering and Physical Sciences Research Council, UK, and the Defence Science and Technology Laboratory, UK. We gratefully acknowledge the contributions to the Finite Element simulations from Dr Xiaowei Wang and Dr Nadia Balhi, University of Bristol, UK. We thank Dr Bernt Johnsen and Spyros Spyridoulias, Imperial College London, UK, and Dr G. D. Dean, National Physical Laboratory, UK, for providing experimental results. We thank Dr D. L. Hunston, National Institute of Standards and Technology, USA, and Professor J. G. Williams, Imperial College London, UK, for valuable discussions.
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Guild, F.J., Kinloch, A.J. & Taylor, A.C. Particle cavitation in rubber toughened epoxies: the role of particle size. J Mater Sci 45, 3882–3894 (2010). https://doi.org/10.1007/s10853-010-4447-y
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DOI: https://doi.org/10.1007/s10853-010-4447-y