Table 1.

Test cases of specimens in Groups A, B, C.

Group A	Case	1	2	3	4	5	6	7	8
	Crack depth (mm)	0	2	4	6	8	10	20	40
Group B	Case	1	2	3	4	5	6	7	8
	Hole depth (mm)	0	2	4	6	8	10	20	40
Group C	Case	1	2	3	4	5
	Hole diameter (mm)	0	3	5	7	9