Finite element analysis of tire thermomechanical coupling rolling resistance
Based on the essential mechanism of tire rolling resistance, a finite element analysis method of handing thermomechanical coupling for rolling resistance was proposed. In order to verify the method, rolling resistance and temperature measurement experiments of rubber wheels made of tread rubber were conducted on a measured on RRS-?? model rolling resistance testing machine. Finite element analysis of rolling resistance and temperature of the wheels were also done, the results shew consistently coincides with that of test. Then the finite element analysis method was used to predict 12.00R20 tire rolling resistance and the influence factors on rolling resistance, such as inflation pressure, vertical loads and speeds were also analyzed.
Determining the Compression-Equivalent Deformation of SBR-Based Rubber Material Measured in Tensile Mode Using the Finite Element Method
A timesaving characterization approach of rubber materials in compression using the finite element method (FEM) is presented. Rubber materials based on styrene butadiene rubber (SBR) are subjected to tensile and compression tests. Using the neo–Hooke, Mooney–Rivlin and Yeoh material models, a compression-equivalent deformation of the SBR samples is derived from the tensile testing. The simulated state is then compared with the experimental results obtained from compression measurement. The deviation in the strain energy density between the measurements and the simulations depends on the quality of the fitting.
Improvement of Overload Capability of Air Carrier Aircraft Tires.
Abstract : Statistical and analytical data are used to develop Transport Aircraft Ground Operations scenarios describing tire loads, deflections, temperatures, and distance traveled. These scenarios are used to aid in defining the critical conditions causing tire overload. Reasons for failure of overloaded tires are developed and used to identify potential improvements for overload capability for tires currently in use. Cost tradeoff studies are made to indicate which of the improvements appear promising for further development. Concepts for new designs capable of overload are discussed along with 'runflat-ideas.' Using information developed in the program, tire maintenance practices that may improve the overload performance of current tires are presented.