Modeling of Deflection for Radial-Ply Tire Based on Tire Dimensions, Inflation Pressure, Vertical Load and Rotational Speed

This study was conducted to model deflection ( ) of radial-ply tire based on tire dimensions, viz., section width (b) and overall unloaded diameter (d), inflation pressure (P), vertical load (W) and rotational speed (N). For this purpose, deflection of three radial-ply tires with different section width and overall unloaded diameter were measured at three levels of inflation pressure, four levels of vertical load and six levels of rotational speed. In order to model deflection based on dimensions, inflation pressure, vertical load and rotational speed, seven multiple-variable linear regression models were suggested and all the data were subjected to regression analysis. The statistical results of study indicated that the five-variable linear regression model = 178.12 + 0.3354 b - 0.3800 d - 0.3788 P + 0.0651 W - 0.0019 N with R = 0.9777 may be suggested to 2 predict deflection of radial-ply tire based on section width, overall unloaded diameter, inflation pressure, vertical load and rotational speed for a limited range of radial-ply tire sizes. However, experimental verification of this model is necessary before the model can be suggested for wider use.