A pressure-sinkage model for small-diameter wheels on compactive, deformable terrain

作者：Meirion Griffith Gareth^*; Spenko Matthew

来源：Journal of Terramechanics, 2013, 50(1): 37-44.

DOI：10.1016/j.jterra.2012.05.003

• Small wheels
• Wheel diameter
• Wheel width
• Compactive soil
• Pressure-sinkage

Traditional terramechanics theorems utilize pressure-sinkage models based on the assumption that the contact area between a tire and soil can be approximated as a flat plate. Examples include work by Bernstein-Goriatchkin, Bekker, Reece, and Ishigami. Recently, the authors have demonstrated that (1) this assumption does not hold for wheels with a diameter less than approximately 50 cm and (2) an improved diameter-dependent pressure-sinkage model can yield more accurate results. Further improvements to the pressure-sinkage model for small diameter wheels are presented here that account for both wheel width and diameter on compactive soils. Results from 125 pressure-sinkage tests using 35 wheel geometries on a clay/silt mix are presented. X-ray images of sub-surface soil deformation are used to visually validate the model.

• 出版日期2013-2