Project Details
Projekt
Multi-criterial assessment and design of a road top layer design as a interacting partner of the tire
Applicant
Professor Dr.-Ing. Lutz Eckstein
Subject Area
City Planning, Spatial Planning, Transportation and Infrastructure Planning, Landscape Planning
Term
from 2014 to 2019
Project identifier
Deutsche Forschungsgemeinschaft (DFG) - Project number 239224712
The design of durable pavement constructions for future traffic loads requires 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. The detailed knowledge and description of the load collectives caused by the vehicles are the essential prerequisites for the layout of durable pavement constructions. Goal of this subproject is the determination of the vehicle´s load impact of current and future vehicle populations.In the first project period, a load prediction model was established that is based on a modular modeling of vehicle individuals as a combination of vehicle type, subsystem and tire. A vehicle data base was implemented, which allows to simulate comprehensively a multitude of different vehicle combinations in an efficient manner. Special focus was also put on the required modelling depths of the particular subsystems. Furthermore, a deeper knowledge of the load transfer processes between tire resp. tread compound and road surface was generated in the first project period by extensive experiments with the linear friction tester and the mobile tire test rig on real roads. A method for indoor-testing of the vehicle-tire-road interaction was elaborated. Especially, the different effects arising from standing and rolling tires were investigated. While hitherto the fundamental simulation and test methods have been established, the second project period shall focus on the diverse respectively uncertain influencing factors of realistic application scenarios. Besides the present considerations of vertical loads, also the horizontal forces shall be taken into account as these are of special interest for the simulation approaches of subproject 1 and subproject 2. Furthermore, the significant properties rolling resistance and friction coefficient will become simulative assessable by taking into account the interdependencies between road´s structural stiffness and vehicle dynamics. This goal will be reached by combining the simulation approaches with subproject 1 and subproject 2. The target-oriented design of a road surface with respect to its friction properties shall be investigated by a method for creating an equivalent surface structure by means of additive manufacturing. By combining the competences of all subprojects this approach will be comprehensively assessable. The test method for testing road loads shall be extended in future and used to support the development process of a road friendly chassis by means of an adaptive damper. Achieving this objective involves the development of a control algorithm to reduce dynamic road loads by using adaptive chassis technology. The achieved quality of the algorithm shall by evaluated by using the afore established methodology.
DFG Programme
Research Units
