Verifying the empirical models of rolling resistance using the results obtained from soil bin facility

Haleh Maslak, Aref Mardani
2015 Journal of Advances in Vehicle Engineering   unpublished
Two tyre rolling resistance predicting models were evaluated and compared. Bekker model and one of the WES models (Wismer and Luth model) were selected as predicting models. Some experimental tests were performed on a controlled soil bin filled with clay loam soil to validate the selected rolling resistance models using a single wheel tester. A towed Good year 9.5L-14, 6 radial ply tyre was tested at different levels of inflation pressure and normal load (50 to 250 kg). These levels were
more » ... shed based on the load deflection characteristics of the test tyres studied on a rigid surface within the permissible deflection range of 30 percent. The forward speed of the test carriage was maintained at 3 km/h. An effort was made to develop the models based on tyre mobility number approach to predict rolling resistance of the tyre. The models related to WES-method offer a great number of different models applicable for typical soil-tyre systems. The suitability of the method for the prediction of the tyre rolling resistance needs more investigations and experimental tests. Wismer and Luth model (as a WES model) presented more reliable results for rolling resistance prediction. Bekker model (as a semi-analytical model) provided less dependable predictions of rolling resistance.
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