Surface fatigue wear widely exists, and it occurs as long a sufficient number of loading–unloading cycles are applied. Slowing down surface requires understanding the evolution damage in surface. Real surfaces composed many asperities; therefore, is important to study single asperity. A finite element model an asperity subjected cyclic elastic–plastic normal loading was developed under friction...

This paper proposes an improved thermal asperity (TA) detection and correction technique for perpendicular recording channels, which performs better than the conventional one. The TA detection method is a threshold-based approach, while the TA correction method is performed by averaging the readback signal and applying a curve-fitting technique to estimate the TA signal. Then, the corrected rea...

In this paper, a generalized self-consistent scheme, or “three phase model”, is used to set up a micro-mechanics model for rough surface contact with randomly distributed asperities. The dimensionless average real pressure p is obtained as function of the ratio of the real contact area to the apparent contact area, 0 / A Ar . Both elastic and plastic materials are considered, and the influence ...

Abstract When an electric current flow across interface between two contacting solids a change in the potential occur over interface. One part of contact resistance is due to constrictions at asperity regions. Barber has shown that constriction can be related interfacial stiffness. I discuss relation classical (approximate) Holm theory for and (exact) involving Graphical

Sliding motion between two rough solids under light normal loading involves myriad micro-impacts antagonist micro-asperities. Those are at the origin of many emerging macroscopic phenomena, including friction force, slider's vibrations and noise radiated in surroundings. However, individual properties (e.g. maximum position along interface, duration) essentially elusive to measurement. Here, we...