Optimal Selection of the Reference Potential Probe Point in DCPD Real-Time Monitoring of Crack Growth Rate

Table 4

The difference between the RPD after optimization of crack independence.

Number n	Crack length am (mm)	Crack length an (mm)	The difference between RPD ΔU (μV)	Probe point K1 (i, j)	Probe point K2 (i, j)
55330	12.5	13	1.21E  −  05	62 (31, 15)	150 (29, 14)
55441	12.5	13.5	1.19E  −  05	228 (25, 13)	367 (24, 12)
55226	12.5	14	1.16E  −  05	62 (31, 15)	230 (27, 13)
55310	12.5	14.5	3.01E  −  05	62 (31, 15)	230 (27, 13)
55044	12.5	15	3.14E  −  05	140 (19, 14)	221 (16, 13)
55050	12.5	15.5	1.28E  −  0.5	66 (0, 13)	370 (27, 11)
55075	12.5	16	1.09E  −  05	150 (29, 14)	230 (27, 13)
55552	13	13.5	1.47E  −  05	52 (0, 14)	141 (6, 15)
55320	13	14	1.26E  −  05	62 (0, 14)	130 (6, 15)
55383	13	14.5	1.48E  −  05	140 (19, 14)	221 (16, 13)
55200	13	15	1.24E  −  05	151 (30, 14)	429 (22, 6)
55332	13	15.5	2.37E  −  05	215 (12, 13)	408 (15, 8)
55128	13	16	2.69E  −  05	150 (29, 14)	230 (27, 13)
55419	13.5	14	1.96E  −  05	62 (31, 15)	230 (27, 13)
55527	13.5	14.5	2.58E  −  05	124 (4, 14)	483 (15, 9)
55362	13.5	15	1.85E  −  05	291 (15, 12)	430 (21, 5)
55475	13.5	15.5	2.59E  −  05	58 (27, 15)	397 (9, 8)
55223	13.5	16	1.63E  −  05	150 (29, 14)	230 (27, 13)
55699	14	14.5	1.32E  −  05	62 (31, 15)	150 (29, 14)
55493	14	15	2.23E  −  05	150 (29, 14)	230 (27, 13)
55581	14	15.5	2.93E  −  05	150 (29, 14)	230 (27, 13)
55347	14	16	2.09E  −  05	291 (15, 12)	451 (17, 10)
55587	14.5	15	1.65E  −  05	150 (29, 14)	230 (27, 13)
55683	14.5	15.5	1.69E  −  05	150 (29, 14)	230 (27, 13)
55524	14.5	16	2.07E  −  05	150 (29, 14)	230 (27, 13)
55872	15	15.5	1.64E  −  05	153 (30, 12)	370 (27, 11)
55702	15	16	3.01E  −  05	150 (29, 14)	230 (27, 13)
55198	15.5	16	2.24E  −  05	52 (0, 14)	150 (29, 14)