Multifeature Extraction of Three-Dimensional Topography of Carbon Steel Specimen during Fatigue Process

Table 2

Six sets of test data values for each damage state.

Fatigue cycle	μ	δ	A	Sa	Δα
0	0.224	3.487	13400	1.6152	0.9813
2000	0.9022	4.309	10370	2.0777	0.99
4000	1.531	5.835	7598	3.7357	1.0365
6000	2.72	8.375	5104	5.9485	1.1175
8000	6.285	10.15	3898	9.5093	1.22
Fracture	12.42	19.1937	2314	14.5985	1.4112