Wear Behavior Analysis Using the Multi-mass Tire Model

抄録

The purpose of this study is to propose the analytical model of tires and to examine the mechanism of polygonal wear from the numerical results. Polygonal wear is one of the abnormal phenomena caused in a time delay system. A number of studies on polygonal wear of tires have been conducted. However, the investigation of the growing process of polygonal wear is not sufficient because the surface shape of the tire changes constantly by wear. Therefore, a numerical simulation model which can examine the transient behavior is necessary. In this paper, the tire model composed of mass points is proposed. The wheel is simulated as a rigid body, and the tire tread is simulated as a number of masses positioned around the circumference. The tire masses are connected to points around the circumference of the wheel by rotational and translational Voigt elements. The tire masses are connected by translational Voigt elements. Elastic contact is defined between the tire and the road surface. A slider is set in the tangential direction to express the Coulomb friction when a slip occurs. Numerical simulations have been carried out under several conditions using the proposed model. The distribution of the contact forces and the slip ratio were examined. The basic characteristics of the model are confirmed. After confirming the validity of the model, the wear shapes of tires were examined by the proposed model. It was shown that the polygonal wear occurred under certain conditions.