Prediction of the large strain mechanical behaviour of heterogeneous polymer systems by a multi-level approach

R.J.M. Smit, W.A.M. Brekelmans, H.E.H. Meijer

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Abstract

Shear band formation in heterogeneous tensile bars was studied using an accurate homogenization method that allows for a numerical coupling between the microscopic and macroscopic stress-strain behavior. The procedure is based on a classical homogenization theory, assuming local spatial periodicity of the microstructure, and supplies a consistent objective relation between the local macroscopic deformation and the microstructural deformation of a spatially periodic representative vol. element (RVE), representing the local microstructure. The method was used to predict the influence of the microstructure on localization phenomena in plane strain hour-glass-shaped polycarbonate specimen with different vol. fraction of non-adhering low-modulus rubbery particles. An irregular particle distribution seems to promote deformation spreading over the sample, which leads to enhancement of toughness of heterogeneous polymer systems by the addn. of easily cavitating rubbery particles
Original languageEnglish
Title of host publicationEleventh International Conference on Composite Materials, Gold Coast, Australia, July 14-18, 1997
EditorsM.L. Scott
Place of PublicationCambridge
PublisherWoodhead
PagesV585-V594
Number of pages10
Volume5
ISBN (Print)1-85573-350-1
Publication statusPublished - 1997

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    Smit, R. J. M., Brekelmans, W. A. M., & Meijer, H. E. H. (1997). Prediction of the large strain mechanical behaviour of heterogeneous polymer systems by a multi-level approach. In M. L. Scott (Ed.), Eleventh International Conference on Composite Materials, Gold Coast, Australia, July 14-18, 1997 (Vol. 5, pp. V585-V594). Woodhead.