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Prediction of wheel performance by analysis of normal and tangential stress distributions under the wheel-soil interface
Prediction of wheel performance by analysis of normal stress distribution under the wheel-soil interface was reported by one of the research members. In this study analysis of both normal and tangential stress distributions are included for the prediction of wheel performance. A visco-elastic soil model based on a three-element Maxwell model is used to evaluate normal stress distribution under a wheel running on soft ground. The values of the parameters characterizing the visco-elastic behavior of the soil can be derived from plate penetration tests. A rigid wheel-soil interface model is used to evaluate the tangential stress distribution under the wheel-soil interface. Shear deformation modulus, cohesion and angle of internal shearing resistance of the soil are derived from shear-displacement tests. Test results indicate that both maximum normal and shear stress occur in front of the wheel axle, and the location of peak normal stress shifts backwards towards the wheel axle while that of tangential stress shifts forwards when slippage is increased from a low value. Increasing slippage also causes a decrease in normal stress and an increase in tangential stress. Coefficients of traction and tractive efficiency are low at low slippage, increase with an increase in slippage, and level off at higher slippage.
Prediction of wheel performance by analysis of normal and tangential stress distributions under the wheel-soil interface
Prediction of wheel performance by analysis of normal stress distribution under the wheel-soil interface was reported by one of the research members. In this study analysis of both normal and tangential stress distributions are included for the prediction of wheel performance. A visco-elastic soil model based on a three-element Maxwell model is used to evaluate normal stress distribution under a wheel running on soft ground. The values of the parameters characterizing the visco-elastic behavior of the soil can be derived from plate penetration tests. A rigid wheel-soil interface model is used to evaluate the tangential stress distribution under the wheel-soil interface. Shear deformation modulus, cohesion and angle of internal shearing resistance of the soil are derived from shear-displacement tests. Test results indicate that both maximum normal and shear stress occur in front of the wheel axle, and the location of peak normal stress shifts backwards towards the wheel axle while that of tangential stress shifts forwards when slippage is increased from a low value. Increasing slippage also causes a decrease in normal stress and an increase in tangential stress. Coefficients of traction and tractive efficiency are low at low slippage, increase with an increase in slippage, and level off at higher slippage.
Prediction of wheel performance by analysis of normal and tangential stress distributions under the wheel-soil interface
Vorhersage des Radverhaltens durch Analyse der Normal- und Tangentialspannungsverteilungen unter der Rad-Erdboden-Grenzschicht
Wanjii, S. (author) / Hiroma, T. (author) / Ota, Y. (author) / Kataoka, T. (author)
Journal of Terramechanics ; 34 ; 165-186
1997
22 Seiten, 13 Bilder, 1 Tabelle, 26 Quellen
Article (Journal)
English
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