Approaches to Stick-Slip Analysis in Tribology

Abstract The stick-slip phenomenon is a frictional instability frequently encountered in mechanical systems, characterized by alternating phases of static adhesion and sudden sliding. This paper presents two experimental methodologies for analyzing this behavior using the CETR UMT-2 Tribometer. The first method employs a unidirectional linear oscillator with a single degree of freedom, while the second follows a methodology based on the VDA 230-206 standard. These approaches enable controlled tribological testing, facilitating precise measurement of frictional forces, displacement, and acceleration data. To support data acquisition, an MMA8451Q accelerometer was integrated with an Arduino Nano 33 BLE development board, allowing real-time monitoring of acceleration variations during stick-slip motion. The collected data was used to evaluate the influence of surface roughness and contact pressure on stick-slip dynamics. By outlining these methodologies, this paper provides a structured framework for studying friction-induced instabilities, contributing to the advancement of tribological research and its applications in mechanical engineering.