Development of a Predicting tool for the wet grip potention of pavements

摘要

The main objective of this paper is to develop a tool for the prediction of the wet friction betweenrubber tyre and road pavement. This analytical approach was transferred to a 2D numericalmulti-body system consisting of interconnected masses, dampers and springs. The complexstrain and temperature dependent visco-elastic properties of rubber are represented by extendedZener elements with prony series approach. Input quantity is the measured texture profile of theroad and output is its friction coefficient. The numerical equations are solved by a time step integrationscheme. There are 2 modules allowing for the calculation of the vertical movement of thetire tread into the pavement on the one hand and the horizontal movement (sliding motion overthe pavement) on the on the other hand. The first one calculates how deep the rubber tread penetratesinto the pavement texture and the second calculates the amount of friction generated. Firstresults concerning the penetration depth are promising although the model is not validated yet.The horizontal movement is causing difficulties for the differential equation solver at the verymoment. We are working on a solution to overcome that problem.