Browse Publications Technical Papers 2008-01-0779

Analysis of Wheel-Soil Interaction under Combined Slip Condition 2008-01-0779

The understanding of wheel-soil interaction under longitudinal and lateral slip conditions is very important for off-road vehicle dynamics. However, understanding the physics of wheel-soil interaction is not easy, especially with uncertain operational environment and with the limitation of current measuring technique and hardware. This paper explores important aspects of off-road vehicle mobility using as a case study a 7 degree of freedom (DOF) vehicle model under steady-state cornering. In the evaluation of the vehicle response over a two-dimensional (2-D) terrain profile the load transfer due to cornering was taken into account. The tractive and the cornering vehicle capabilities were predicted using an algorithm that chooses the appropriate tire model (rigid or flexible) and finds the optimal geometry of the contact patch. The parameters of the wheel-soil interaction, such as the sinkage, the entry and exit angles, the relaxation length, the slip angle, the normal pressure, the longitudinal shear stress and displacement, and the lateral shear stress and displacement, were determined.
In this study, all simulations were done under deterministic and stochastic scenarios. The vehicle model and the terrain profile used were developed in a deterministic framework. In addition to the average ground pressure and the slip ratio, key soil parameters were considered uncertain in the prediction of tractive and cornering capabilities. A polynomial chaos approach was used to quantify and propagate these uncertainties through the model.


Subscribers can view annotate, and download all of SAE's content. Learn More »


Members save up to 16% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:

Acquisition of Transient Tire Force and Moment Data for Dynamic Vehicle Handling Simulations


View Details


Optimization of Off-Road Mobility and Handling by Anti-Roll Bar Deletion and Shock-Up Tuning on Military Vehicle: A Case Study


View Details


Time-Dependent Tire-Snow Modeling for Two-Dimensional Slip Conditions


View Details