Damage Detection of Closed Crack in a Metallic Plate Using Nonlinear Ultrasonic Time Reversal Method

Table 2

DI of different paths.

Number	Path	DI	Number	Path	DI
1	2–10	0.1982	9	5–14	0.0499
2	2–13	0.0863	10	6–11	0.0302
3	3–9	0.1451	11	7–9	0.1188
4	3–12	0.0965	12	7–14	0.0535
5	4–12	0.0628	13	7–16	0.0345
6	4–13	0.0440	14	8–12	0.0414
7	4–16	0.0459	15	8–13	0.0420
8	5–10	0.1394	16	8–14	0.0503