Simulation of stick-slip friction: Nonlinear modelling and experiment validation

Abstract

A determining factor of the quality of a vehicle is the audible interior squeak and rattle (S&R) noise. This study aimed to model the friction induced stick-slip phenomenon, which is the main cause behind the squeak noise. This was done by first doing tests on a stick-slip test bench. The results gained from the experiments were processed and used for the FE model. Secondly a FE model was set up, on which a parametric investigation was done. During FE modeling an experiment postprocessing method was established and validated. Many FE cases were run, and the results were compared to the experimental ones. For the comparisons some metrics were established which can be related to the severity of the stick-slip event. The main achievement of this work was the model setup approach and the validated FE model which form the basis of the simulation and follow the experimental trends of the stick-slip phenomenon. With the help of this study engineers will be able to simulate stick-slip events in CAE environment and determine its severity early and upfront in the product development process.