Feb 19, 2022 | Terrabite » View recording
Speaker: Dr. Paul Ayers, ISTVS Fellow, Biosystems Engineering Professor Emeritus,
University of Tennessee
Development of a physics-based dynamic visco-elastic vehicle-soil interaction model for rut depth, energy, and power determinations
The Next Generation NATO Reference Mobility Model (NG-NRMM) provides an opportunity for the utilization of physics-based Vehicle Terrain Interaction models. This presentation provides the framework for possible vehicle-soil interaction components to assist model development. The physics-based components include tire placement, surface loading, stress distribution, time-dependent soil compression (multi-pass), preconsolidation stresses, soil rebound, lateral displacement, slip sinkage, and soil bulldozing. By summing soil force and displacements, and utilizing time components, soil mobility energy and power can be determined.
ISTVS has been hosting online events for research on terramechanics and terrain-vehicle systems under our Digital Event Series since 2021. Recordings from the series are posted to our YouTube channel. Make sure you’re subscribed to the ISTVS Newswire to keep up on upcoming events.
Speaker Bio
Paul Ayers
Dr. Paul Ayers is a Biosystems Engineering Professor Emeritus at the University of Tennessee. He has been evaluating vehicle movement patterns and terrain impacts of military vehicles since 1990. Some of his studies include the development of a vehicle terrain impact model and analyzing and modeling the influence of speed, turning, and soil conditions on terrain impacts for tracked and wheeled vehicles, including multi-pass. Dr. Ayers has used GPS to determine military vehicle movement patterns and georeferenced site-specific vehicle impacts (vegetation removal and rutting) at multiple military installations. He demonstrated the use of GPS-based vehicle tracking to identify new off-road trail development and the column movement of vehicle platoons. From 2015 to 2020, he was the United States Secretary for the International Society for Terrain Vehicle Systems (ISTVS) and was recently named ISTVS Fellow.
