Fig 1.
Specimen dimension.
Fig 2.
Geometry and dimension of surface notches.
Fig 3.
The model with surface roughness in ABAQUS.
Fig 4.
Fixed mode of specimens.
Fig 5.
Grinding of specimen.
Fig 6.
Principle of FE calculation to determine stress concentration factor.
Fig 7.
Fatigue test.
Fig 8.
The relation curve between Kt and a/b in a single micro-notch.
Fig 9.
The relation curve between Kt and b in a single micro-notch.
Table 1.
The fitting error of single micro-notch empirical formula.
Fig 10.
Relation between n and Kt.
Fig 11.
Relation between a/b and Kt of multi-micro-notches.
Fig 12.
Relation between d/(2a) and Kt of multi-micro-notch.
Table 2.
The fitting error of empirical formula for multi-micro-notches.
Fig 13.
Arbitrary surface profile and standard surface roughness parameters.
Table 3.
Roughness values of each specimen.
Fig 14.
Picture of specimen surface topography.
Fig 15.
Surface morphology of specimens after grinding.
Table 4.
Maximum dent depth value Rz of specimens observed by microscope.
Table 5.
Empirical formula fitting error for Kt.
Table 6.
Estimated performance parameter values (MPa).
Table 7.
Comparison of fatigue life for prediction and experiment.