Investigation of the Eect of Pad Geometry on Flat and Rounded Fretting Fatigue

In this paper, the eect of geometrical parameters on the fretting fatigue of a half-plane in contact
with a
at and rounded pad is studied. This is accomplished by calculating and comparing the
stress states and stress intensity factors of fretting cracks for a number of pad geometries. The
pad geometry is represented by the radius of its rounded corners and the width of its central
at
part. The distribution of dislocation method is employed to calculate the stress intensity factors
of fretting induced cracks of dierent lengths for dierent values of geometrical parameters. The
results of this study can be insightful for improving the geometrical design of an aero-engine
compressor disk, as similar contact and damage are prone to occur in its dovetail region.