In mechanical systems there are three major sources of friction; asperity interaction, adhesion and plowing, (Suh and Sin. 1981; Suh. 1986). An asperity is a slight protrusion from a surface such as a bump or point. As two mechanical surfaces slide past each other these asperities collide, resisting motion. As the force increases asperities are sheared off or deform, eventually becoming loose wear particles as shown in figure 1.
展开▼
