Off-road cars and tractors with 3D tyre models for fast rolling simulation

External tyre dynamics means the rolling of a membrane-type elastic body with a small bending disturbance. Internal tyre dynamics is the coupling between belt and carcass by rubber shear forces and between belt cord layers by the shear of rubber coatings. One has to take into account that cord stresses in the belt in reality are smaller than they are prescribed by the membrane kinematic. The first approximation is to reduce the belt cord stiffness at belt shoulders near the sidewalls. A further approach is to introduce more degrees of freedom for describing the shear deformation in a separate computer program. To avoid extensive computations, a 2D tyre model for rolling on road and in soil was used for cars and tractors. In the case of a 2D tyre model, the longitudinal stiffness of the belt (a mean value) can be computed by using the measured expansion of tyre during the inflating process. Out of the plane, the body behaves as a rigid ring on elastic foundation. Within the sidewalls, the cords are radially orientated; the rubber is only a coating. This model is much faster in computation and can also be used for crash simulation and for tyre noise computing. To compare rolling on deformable soil with rolling on road, a 3D tyre model was used. Several examples, also landing of an airplane on a grass field, are given. For the covering abstract see ITRD E127429.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0415392632
• Authors:
  • LUGNER, P (
  • PLOECHL, M (
  • BOEHM, F
  • DUDA, A
• Publication Date: 2005

Language

• English

Media Info

• Pagination: 493-507
• Serial:
  • TYRE MODELS FOR VEHICLE DYNAMICS ANALYSIS. PROCEEDINGS OF THE 3RD INTERNATIONAL COLLOQUIUM ON TYRE MODELS FOR VEHICLE DYNAMICS ANALYSIS (TMVDA) HELD IN UNIVERSITY OF TECHNOLOGY, VIENNA, AUSTRIA, AUGUST 2004
  • Volume: 43
  • Publisher: Taylor & Francis

Subject/Index Terms

• TRT Terms: Agriculture; Conferences; Crashes; Deformation; Design; Mathematical models; Noise; Pavements; Simulation; Soils; Sport utility vehicles; Stiffness; Tires; Truck tractors
• ITRD Terms: 347: Agriculture; 1631: Collision; 8525: Conference; 5595: Deformation; 9011: Design (overall design); 6473: Mathematical model; 2492: Noise; 2955: Pavement; 9103: Simulation; 4156: Soil; 1241: Sport utility vehicle; 5931: Stiffness; 9080: Three dimensional; 1214: Tractor; 1381: Tyre
• Subject Areas: Design; Environment; Geotechnology; Motor Carriers; Pavements; Vehicles and Equipment; I23: Properties of Road Surfaces; I90: Vehicles; I91: Vehicle Design and Safety;

Filing Info

• Accession Number: 01014302
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• ISBN: 0-415-392-632
• Files: ITRD
• Created Date: Dec 22 2005 2:11PM