Abstract
In this paper, the effects of vehicle multiple passes and turning maneuvers are investigated on rutting for wheeled and tracked vehicles. Field tests were conducted at Fort Riley in August, 2008, on a combat tank M1A1, an Armored Personnel Carrier (APC), a Heavy Expanded Mobility Tactical Truck (HEMTT), and a High Mobility Multi-purpose Wheeled Vehicle (HMMWV). These vehicles were operated in spiral patterns to evaluate a variety of turning radii. Every vehicle was driven in its same rut up to 8 passes along each spiral. A Vehicle Tracking System (VTS) was mounted onto each vehicle to utilize the Global Positioning System (GPS) to determine vehicle dynamics (velocity and turning radius). Compared to a single pass, results show that soil deformation and compaction increase with the increase of the number of passes. The HMMWV rut depth increases by the highest value of 547.8% to its initial rut depth under the effects of the combination of the multi-pass and turning maneuvers after 8 passes. It is also verified that turning maneuvers can affect rut depth significantly, either positive or negative.
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