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In this study, a multivariate composite layer model, computer geometry models, contact pair models, finite element analysis (FEA) models, and bearing grounding mechanical property test system were constructed. FEA and experimental study on the bearing grounding mechanical properties of retreaded tires of engineering vehicles were processed. Therefore, features and rules of load grounding pressure, load grounding mark, load grounding area, load grounding coefficient, and load grounding hardness coefficient of retreaded tires under the static grounding working condition were summarized, from which load-bearing grounding mathematical models of 26.5R25 engineering vehicle retreaded tire were constructed. Analysis results show that the grounding pressure at the tread center of grounding pressure and grounding friction, which increased along the tire width and rolling direction at different degrees, were the smallest under the static grounding working condition. The shape of the earthing marks turned from circular to elliptical, and then close to the rectangle with the load increase, and finally into an approximate saddle shape. When the tire pressure was certain, the earthing area increased gradually with the increasing load and the increasing trend was nonlinear. The ground pressure and grounding force on the tire shoulder of the engineering re-treaded tire was the largest, which could be damaged easily.

Bearing Grounding Mechanical Properties of Engineering Vehicle Retreaded Tire