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Hybrid Simulation of Shear Force Development of a Tire Experiencing Longitudinal and Lateral Slip
Published January 01, 1972 by Institution of Mechanical Engineers in United Kingdom
A model of the pneumatic tire is developed to explain the production of shear forces under different operating conditions and to serve as a mathematical representation of the tire in computer simulations of motor vehicle performance. The paper is concerned with the shear-force output of a tire undergoing combined lateral and longitudinal slip motions. For purposes of analysis, the carcass of the tire may be represented by a structure whose elastic properties are defined by an experimentally obtained influence function. Additional elastic tread elements typically, possess unequal stiffnesses in longitudinal and lateral directions. The vertical pressure distribution in the area of contact between elastic elements and the road may be taken from actual experiments on a rolling tire. The coefficient of friction is considered to be dependent on the speed with which the end of a tread element slides relative to the road surface. The calculations have been carried out on an AD-4 Hybrid Computer. Simplified computer block diagrams are presented and some typical results are discussed.