Modeling of Bias-Ply Tire Contact Area Based on Tire Dimensions, Tire Inflation Pressure and Vertical Load on Tire Using Linear Regression Models

摘要

This study was conducted to model contact area (A) of bias-ply tire based on tire dimensions, viz., section width (b) and overall unloaded diameter (d) of tire, tire inflation pressure (P) and vertical load on tire (W). For this purpose, contact area of three bias-ply tires with different section width and/or overall unloaded diameter were measured at three levels of inflation pressure and four levels of vertical load. In order to model contact area based on dimensions, inflation pressure and vertical load, 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 multiple-variable linear regression model A = 171.65 - 0.2280 b - 1.6818 d - 2108.6 P + 33.429 W with R2 = 0.910 may be suggested to predict contact area of bias-ply tire based on tire dimensions, tire inflation pressure and vertical load on tire for a limited range of bias-ply tire sizes. However, experimental verification of this model is necessary before the model can be recommended for wider use.