衝撃荷重下の氷球の高速破壊に関する研究

抄録

Ice is one of the most common brittle solid materials in our life, but its physical properties such as those of inelastic collision and dynamic fracture, have not been entirely comprehended so far. In our former research, we have utilized our high-speed digital video camera and the numerical ED (Event-Driven) method to study the mechanical behavior of ice spheres colliding against a plate of ice. We have quantitatively clarified the influence of the relative impact velocity on the behavior of ice as a granular material. Here, we perform further dynamic impact experiments in our laboratory and three-dimensional numerical simulations of wave propagation and interaction to try to deepen our understanding of the mechanism of fracture development in ice spheres subjected to impact loading.