The contribution to frictionFriction stemming from dissipation of plastic energy is studied by numerical simulations and experiments. geometrical setup consists a single model asperity, which first flattened against tool with grooves on smaller length scale. Relative, tangential sliding between the asperity induced subsequently until steady state reached. flank angle varied. Comparison experime...

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The morphology of the joint interface is described using geostatistical parameters such as the sill, range and slope of the initiaI part of the variogram. The methodology is also used to identify the scale effect and to determine the appropriate cutoff length of the sample which is representative for a direct shear test. The anisotropy characteristics of the interface are described using the si...

Modeling predictions and experimental measurements were obtained to characterize the electro-mechanical response of radio frequency (RF) microelectromechanical (MEM) switches due to variations in surface roughness and finite asperity deformations. Three-dimensional surface roughness profiles were generated, based on a Weierstrass–Mandelbrot fractal representation, to match the measured roughnes...

Experiments that systematically explore rock friction under crustal earthquake conditions reveal faults undergo abrupt dynamic weakening. Processes related to heating and weakening of fault surfaces have been invoked explain pronounced velocity Both contact asperity temperature Ta background T the slip zone evolve significantly during high-velocity due heat sources (frictional work), sinks (e.g...