STIFFNESS PROPERTIES CHARACTERIZATION OF PNEUMATIC TIRE BY METHODS OF COMPUTER-AIDED 3D MODELING
DOI:
https://doi.org/10.20535/2305-9001.2015.75.56129Keywords:
a pneumatic tire, stiffness, deformation, finite element method, piecewise-toroidal coordinate system, the contact interactionAbstract
The purpose. The paper deals with the computer finite-elements 3D modelling of the pneumatic tires in a contact interaction with the almost rigid road surface that allowed to find the different types of tires operational stiffnesses (vertical, lateral and longitudinal). Design/methodology/approach. In the paper, it is developed a three-dimensional geometry and finite element model of the pneumatic tire, which takes into account the peculiarities of its geometry, multilayer structure and orthotropy of a mechanical properties in the rubber-cord layers. The system of piecewise-toroidal coordinates is proposed to specify the curvilinear orthotropy of the corresponding layers in the model. The calculations of the elastic contact of the tire with the road have been carried out at the different types of load: vertical, lateral and longitudinal with the different values of the internal pressure. Findings. The dependencies of the displacement (vertical compression or lateral shear) of the wheel rim on the applied loads are defined. From the obtained results, the stiffness factors in different directions were calculated and their dependence on the internal pressure value have been analyzed. Originality/value. The results can be used in the development of new tires design parameters, as well as in a computerized systems of the car movement control and stability (ABS, ESP, StabiliTrak).
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