Structure Design And Performance Analysis Of Non-pneumatic Tire

The tire is the only key functional assembly component between the vehicle and the road surface,which plays an important role in driving the vehicle,supporting the vehicle load and transmitting the anisotropic force.All the basic performance of the vehicle,such as braking and driving are closely related to the tire.At present,the pneumatic tire is still the mainstream of the market,but the pneumatic tire has some disadvantages that can not be ignored,such as poor anti-puncture ability,basically can not run after air leakage,and there are some problems such as the risk of tire burst and the complicated manufacturing process.Compared with the traditional inflatable tire,the non-inflatable tire has the advantages of free inflatable,anti-sticking,economic,wear-resisting,low rolling resistance and so on.This topic is to design a non-inflatable tire which is compatible with the intelligent minibus of a certain unit.Based on the finite element model of the tire and the structural optimization analysis method,the design scheme of honeycomb tire is proposed,and the tire trial production and test are carried out with the assistance of a certain unit.It provides a research basis for the design and development of non pneumatic tire.Firstly,the monomer structure of the honeycomb tire was designed,and a three-dimensional model was established through CATIA.Based on ABAQUS,different material constitutive models were selected to fit the tensile test data.The Mooney-Rivlin model and Yeoh model were selected to characterize the support body and tread material respectively.Hyper Mesh was used to divide the mesh of the model,the load and boundary conditions of the model were defined,and the three-dimensional finite element model of honeycomb tire was established.Secondly,the influence of the thickness of honeycomb wall and the number of support on the maximum stress and strain of honeycomb tire was studied by finite element analysis.Combining with the maximum fracture stress of polyurethane material,the ideal support structure was preliminarily determined.Based on the determination of the ideal support structure,the influence of the support structure parameters on the ground imprinting and the three-way stiffness was studied by the same method.By comparing with the three-way stiffness of the standard tire,the trial production scheme with the thickness of the honeycomb wall of 6mm and the number of the support body of 20 was determined by comprehensive comparison.Finally,the trial-production of the sample tire and the three-direction stiffness test were carried out,and the three-direction stiffness of the honeycomb tire was simulated and tested under different vertical loads.The results of simulation analysis are in good agreement with the test results,which indicates that the honeycomb tire model established in this paper has high accuracy and the ability to predict the three-direction stiffness of the tire.