Thermo-mechanical analysis of tires in stationary rolling contact
|Bearbeitung:||M.Sc. Robert Beyer, Prof. Dr.-Ing. Udo Nackenhorst|
|Förderung durch:||German Research foundation (DFG)|
The optimization of tire designs towards less rolling resistance and higher durability is still a challenging task. In the recently finished project (Link to Anuwat Suwannachit 2012) a thermo-mechanical framework for the calculation of the energy dissipation in the bulk material of stationary rolling tires was developed. Exploiting the advantages of the Arbitrary Lagrangian Eulrerian (ALE) kinematics description the rolling contact problem is treated in a very efficient way.
The aim of this project is the extension of that framework to account for dissipative effects in the tread cap and its contribution to the rolling resistance of tires. To reach this aim, the thermal and mechanical interactions of single tread blocks with the rough road surface undergoing large deformations at high frequencies are studied in detailed simulations. Due the randomness of the surface a statistical homogenization is necessary. Here, the Quasi-Monte-Carlo method is applied.
The final goal is to derive of a constitutive model that represents this thermo-visco-elastic rough surface contact behavior, which can be directly applied for the calculation of the stationary response.