Fretting may be defined as a friction-driven contact phenomenon in which damage occurs in the vicinity of the contact of two nominally clamped surfaces. In the presence of cyclic tangential loads, the two contacting bodies undergo small-scale, oscillatory, relative tangential motions known as “microslip.” This slipping motion may be localized so that the contacting surfaces do not exhibit global relative motion. Typical microslip amplitudes are on the order of 10-100 µm. The physical mechanism of the damage involves a combination of wear, corrosion, and fatigue. These, in turn, are driven by high stress gradients near the contact and microslip. The resulting nucleated fretting crack may grow in the presence of an external cyclic stress field, ultimately resulting in failure of the component. While fretting damage is very localized, it can have a huge impact on the fatigue life of an engineering component, reducing it by as much as 40%-60% (Waterhouse, 1972).
|Original language||English (US)|
|Title of host publication||Handbook of Lubrication and Tribology, Volume II|
|Subtitle of host publication||Theory and Design, Second Edition|
|Publication status||Published - Jan 1 2012|
All Science Journal Classification (ASJC) codes
- Materials Science(all)