Sur la Refraction de la Cassure par les Chocs

概要

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An uniform dilatational stress was produced in a thin layer of resin melted on a metallic tray by rapid cooling. This layer of resin holded on the tray was floated on the water and some mechanical shocks were given by electric discharges at two or three adjacent points near the bottom of the tray. The phenomena of the refractions of the cracks thus produced in the resin starting from each of these points were studied. At the places where α<90°(α, angle between the direction of the crack starting from one of the sources A' and that of the shock wave from the other source A), the cracks refracted towards the point A, while if α<90°, the cracks refracted in the direction diverging from the point A. The velocity of propagation of these cracks was estimated from the relation between the distances travelled by the crack and the shock wave.
社団法人日本物理学会の論文
1952-12-25