Analysis on 3D fretting contact stresses along thickness under fatigue load

Resumo

This work aims to analyse the effect of filleted edges in the stress distribution on a 3D cylinder-plane
fretting fatigue problem. The 3D configuration is required since the stresses are distributed along the thickness of

the contact interface differently from the common analytical 2D contact stresses solution which consider the plane-
strain state to be critical. More recent studies showed results of 3D numerical simulations for different

configurations of pad and specimen, but they did not consider the effect of the fatigue load. Herein, focus is given
to specimen and pad with the same thickness and both having a small fillet at their edges. This geometry represents
well the milling process when fabricating the test specimens employed in fretting fatigue tests. The effect on the
filleted edge of each one of the three loads (i.e., contact pressure, fretting load, and fatigue load) are analysed and
discussed.