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.
A Simple Method of Handling Thermomechanical Coupling for Temperature Computation in a Rolling Tire
Abstract The thermomechanical analysis of a pneumatic tire is a highly complex process due to the effects of temperature on both the mechanical state and the viscoelastic energy dissipation in the tire. This coupled thermomechanical behavior typically requires that rolling tire temperatures be determined iteratively. As a result, a steady‐state analysis involves updating the temperature dependent elastic and viscoelastic properties as the solution proceeds. The process is further complicated in a non‐steady‐state analysis where material properties need to be updated at multiple intervals in time. A simplified method is proposed. First, the sensitivity of the tire elastic response of the tire to changes in material stiffness is characterized using the “deformation index”. Then, using a commercial finite element program and an appropriate user subroutine, heat generation is expressed as a function of the local temperature using a simple algebraic expression involving the temperature dependent material prope...
A New Approach for the Thermomechanical Analysis of Tires by the Finite Element Method
Abstract A new approach for the complete thermomechanical analysis of a pneumatic tire to estimate cyclic changes in the stresses and strains and obtain the pseudo‐steady state temperature profile in a tire rolling under a load is described. The approach uses a commercially available finite element code and involves a simplified two‐dimensional representation of the tire geometry to reduce computation time. The analysis includes three stages: inflation analysis, contact analysis, and temperature analysis. To handle the large deformations resulting from the inflation and contact loadings, the load is applied in small increments and a linearly elastic deformation is assumed in each increment. The structural and temperature analyses can be coupled through an iterative process to reflect the effect of temperature changes on material properties. Results obtained indicate that in spite of the simplifying assumptions made to reduce computation time, useful approximations to the solution of this complex problem c...