Experimental Study on the Caustics of Moving Cracks and Elliptical Curvature under Impact Loading

Table 1

Specimen dimensions.

Number	Prefabricated defect shape	Ellipse curvature (mm^−1)	Long axis (mm)	Short axis (mm)
L1	Ellipse	20	10	1
L2	Ellipse	5	10	2
L3	Ellipse	1.25	10	4
L4	Ellipse	0.56	10	6
L5	Ellipse	0.31	10	8
L6	Round	0.2	10