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Vol.15, No.1, 2015, pp. 7–10 |
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CRACK KINKING AWAY FROM THE INTERFACE IN DYNAMIC GROWTH CONDITIONS Jelena Djoković1, Ružica Nikolić2,3, Dejan Ilić4, Jan Bunak3 1)University of Belgrade, Technical Faculty of Bor, jelenamdjokovic@gmail.com 2)University of Kragujevac, Faculty of Engineering 3)University of Žilina, Research Centre, Žilina, Slovakia 4)Pupin Telecom Company, Belgrade |
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Abstract The behaviour of a crack is analysed, that lies between two elastic isotropic materials while it propagates dynamically. The question is whether the crack will continue to propagate along the interface or will it kink away from the interface. This ‘competition’ between crack kinking away from the interface and propagation along the interface in dynamic crack growth conditions can be estimated based on ratio of dynamic energy release rates for crack kinking away from the interface and for crack growth along the interface. By comparing this ratio to the ratio of interface toughness and material toughness without the interface, one can predict how the crack will behave, i.e. which way would it continue to propagate, as well as tip rate of the kinked crack. Keywords: interface, crack kinking, dynamic growth |
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