Hoffmann, JustusCui, HaoPetrinic, Nik2018-05-252018-05-252018-05-19Hoffmann J, Cui H, Petrinic N, Determination of the strain-energy release rate of a composite laminate under high-rate tensile deformation in fibre direction, Composites Science and Technology, Volume 164, August 2018, pp. 110-1190266-3538http://dx.doi.org/10.1016/j.compscitech.2018.05.034https://dspace.lib.cranfield.ac.uk/handle/1826/13219In order to successfully model design-critical impact loading events on laminated composite structures, the rate-dependency of the composite material has to be correctly reflected. In this context, the rate-dependency of the strain-energy release rate for fibre tensile failure under high-rate loading conditions has not yet been satisfyingly explored. This study employed compact tension specimens consisting of IM7/8552 for dynamic testing on a split-Hopkinson tension bar system. Data reduction was based on the area method . The obtained strain-energy release rate for testing under high-rate conditions was determined to View the MathML sourceGIc,dynf+=82.0±20.8kJ/m2, exhibiting a salient drop compared to its counterpart obtained under quasi-static loading (View the MathML sourceGIc,QSf+=195.8±18.0kJ/m2). Analysis of the strain field surrounding the crack tip using digital image correlation (DIC) suggested a more extensive damage zone for testing under quasi-static than for high-rate loading. A fractographic analysis of the specimens did not indicate any pronounced difference in terms of fracture surface morphology across the two loading rate regimes.enAttribution-NonCommercial-NoDerivatives 4.0 Internationalhttp://creativecommons.org/licenses/by-nc-nd/4.0/(A) Polymer-matrix composites (PMCs)(B) Fracture toughness(D) Fractography(D) Scanning electron microscopy (SEM)Fibre failureArticle