Fracture Behavior of Brittle Circular Disk under Impact Loading

抄録

In this paper, impact fracture behavior of circular disks, which are made of whetstone or plaster, is discussed experimentally. The fracture phenomena of a disk being dropped on to a rigid plate are photographed for many disks which have various values of ratio a/b (a is the inner radius and b is the outer one.) From these pictures, the cracks appearing in the disks are classified in to several patterns. Next, the stresses developed in the impacted disk are visualized by using the dynamic photoelastic technique. By observing the maximum tensile-stress at the inside or outside surface of the disk, the fracture mechanism of the brittle disks can be estimated.