Abstract
Abstract Researchers revealed the acoustic-emission (AE) mechanism under a sliding friction by establishing an AE root-mean-square (RMS) model where the summit contact was demonstrated as the main AE source. However, only the summit on the upper component of a bi-Gaussian stratified surface can confront a contact and become an AE source. A deterministic AE RMS model is established and applied to real and simulated surfaces to reveal the mechanism of bi-Gaussian stratified topographies on generating AE RMSs. The AE RMS is strongly dependent on component surface parameters rather than entire ones. The surface-height RMS value and the proportion of the upper component are, respectively, positively and negatively related to the AE RMS value by affecting the summit density and curvature radius.
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