Dynamic impact-induced fracture development in ice spheres

Abstract eng:
Ice may be commonly observed in our daily life, but its dynamic properties, especially those associated with inelastic collision and fracture, have not been thoroughly clarified. Therefore, in our previous study, utilising a high-speed digital video camera system in our laboratory and the numerical ED (Event-Driven) method, we have investigated the mechanical motion of ice spheres that impinge upon a plate of ice and based on the observations, we have quantitatively evaluated the scale effect of the relative impact velocity on the collisional behaviour of (a collection of) icy bodies as a granular material. In this contribution, we fi1rther perform laboratory experiments and three- dimensional numerical simulations to mechanically understand the collision of ice spheres against a flat plate, now with much higher impact energy, and try to comprehend the dynamic fiacture process of ice spheres subjected to mechanical impact (dynamic collision).

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