Project Details
Projekt
Multi-physical and multi-scale theorectical-numerical modeling of the tire-pavement-interaction
Applicant
Professor Dr.-Ing. Michael Kaliske
Subject Area
Applied Mechanics, Statics and Dynamics
Term
from 2014 to 2018
Project identifier
Deutsche Forschungsgemeinschaft (DFG) - Project number 239224712
The design of durable pavement constructions for future traffic loads requires on the one hand a deep understanding of the highly dynamic processes inside the substructures of the vehicle, the tire and the pavement as well as of the corresponding interactions occurring during the overrun and on the other hand the prediction of the resulting long-term consequences on the pavement. Further, the vehicle-tire-pavement-system incorporates a lot of input values, e.g. material properties, climatic influences, loading and driving conditions of the vehicles, which are not known exactly a priori but are influencing the coupled system essentially. Thus, a non-deterministic (uncertain) modelling of the coupled system is required in order to derive the relevant influencing factors for pavement damage. The complexity of this goal can only be captured appropriately in the framework of the research group. A numerically efficient continuum mechanical macroscopic and thermo-mechanical finite element (FE) formulation of the coupled tire-pavement interaction model for single short-term overruns based on a stationary Arbitrary Lagrangian Eulerian (ALE) formulation as well as a multiscale model of rubber friction on rough pavement surfaces were developed in the first project period of this subproject. Besides the further development of these submodels, one main goal of this subproject in the present project period is the numerically efficient treatment and prediction of the long-term structural behavior of pavements (rutting) by means of a temporal multiscale analysis. The model has to capture the multiple repeated mechanical short-time impacts on the pavement as well as the climatic effects in terms of time dependent varying temperature fields due to day-night alternation as well as the seasons during one year. Such a complex temporal multiscale analysis is new to the knowledge of the applicant. Therefore, the long-term characteristics of the examined asphalts as well as of the layer bond have to be captured by continuum mechanical models, which are developed based on experimental investigations in subproject 4 and numerical computations of the microscale asphalt model in subproject 2. One further main goal is the development of a profound understanding of the sensitivity and uncertainty of the pavement behavior with respect to the uncertain input values as well as the identification of the values that influence the durability of pavements most as base for targeted optimizations. Therefore, a pavement model accounting for uncertainties has to be developed. Essential and new is capturing the spatial dependence of the uncertain results, since the influence of the uncertain input values on the results differs for each point in the pavement structure.
DFG Programme
Research Units
