Author: Publisher:
ISBN:
Category : Computer simulation
Languages : en
Pages : 192
Book Description
Computational Modeling of Tires
Computational Modeling of Tires
Author: Computational Modeling of Tires
Author: Ahmed K NoorComputational Modeling of Tires
Author: Computational Modeling Of Tires Ahmed K. Noor, Comp. Et Al NASA. Langley Research Center Aug. 1995
Author: Computational Modeling of Tires
Author: Advances and Trends in the Development of Computational Models for Tires
Author: Ahmed Khairy NoorComprehensive Tire Model For Multibody Simulations
Author: Omid KazemiPublisher:
ISBN:
Category :
Languages : en
Pages : 215
Book Description
Tires serve as important components of wheeled vehicles and their analytical modeling has drawn the attention of many researches in the past decades. A high-resolution finite element (FE) tire model contains detailed structural and material characteristics of a tire that exhibit degrees-of-freedom (DoF) in the order of 105 or greater. However, such high-resolution models in their full detail are not practically applicable in multibody dynamic analysis of vehicles and a reduction in their order becomes necessary. In this research different formulations to construct condensed FE tire models suitable for multibody simulations are developed and their characteristics are discussed. In addition, two new and novel forms of substructuring are presented that aim at isolating the contact region of a tire without the need for keeping the boundary DoF which otherwise remain in the reduced system in the standard substructuring procedures. The new substructuring methods provide a great tool in constructing condensed FE tire models with much less total number of DoF compared to cases where a standard substructuring is used. In order to increase the computational efficiency of the condensed FE tire models even further, the possibility of model condensation in the contact region is studied. This research also addresses the applicability of available friction models into the condensed FE tire models. Different formulations of a condensed tire model presented in this research are used to construct several computational models. These models are utilized to simulate certain scenarios and the results are discussed.
Nonlinear Analysis and Modeling of Tires
Author: National Aeronautics and Space Adm NasaPublisher: Independently Published
ISBN: 9781792703676
Category : Science
Languages : en
Pages : 26
Book Description
The objective of the study was to develop efficient modeling techniques and computational strategies for: (1) predicting the nonlinear response of tires subjected to inflation pressure, mechanical and thermal loads; (2) determining the footprint region, and analyzing the tire pavement contact problem, including the effect of friction; and (3) determining the sensitivity of the tire response (displacements, stresses, strain energy, contact pressures and contact area) to variations in the different material and geometric parameters. Two computational strategies were developed. In the first strategy the tire was modeled by using either a two-dimensional shear flexible mixed shell finite elements or a quasi-three-dimensional solid model. The contact conditions were incorporated into the formulation by using a perturbed Lagrangian approach. A number of model reduction techniques were applied to substantially reduce the number of degrees of freedom used in describing the response outside the contact region. The second strategy exploited the axial symmetry of the undeformed tire, and uses cylindrical coordinates in the development of three-dimensional elements for modeling each of the different parts of the tire cross section. Model reduction techniques are also used with this strategy. Noor, Ahmed K. Langley Research Center NASA-CR-200970, NAS 1.26:200970, UVA/528370/CEAM96/101 NAG1-1180...
Exploiting Symmetries in the Modeling and Analysis of Tires
Author: Ahmed Khairy NoorPublisher:
ISBN:
Category : Broken symmetry (Physics)
Languages : en
Pages : 68
Book Description