| Tires are prone to fatigue damage during vehicle travel.Blowout accidents caused by fatigue damage can pose a great threat to drivers and other vehicle personnel,while the generation of used tires can also cause irreversible damage to non-renewable resources and the natural environment.Tires as one of the most complex rubber products,and its fatigue life prediction is very difficult.Engineers and technicians often improve and optimize the fatigue durability of tires through experience,and this traditional way of product optimization has the problems of high R&D cycle and high cost.Although FEA can characterize the tire performance relatively quickly,its complicated operation and high learning difficulty discourage many tire structural design engineers from using this new characterization method in the tire industry.Therefore,how to reduce the learning difficulty of FEA and make it better applied to the fatigue life prediction of tires is also becoming an issue of concern to the engineering and academic communities.In this paper,we analyze and compare various modeling approaches,establish the finite element model and material parameter model of 11.00R20 size load radial tire,and verify the validity by the actual measurement data such as the outer diameter of inflation and sinkage.Using Python programming language to write scripts,the finite element modeling process of the tire was developed twice to build a radial tire finite element analysis platform to parameterize the complex and difficult to learn finite element modeling process.The secondary developed FEA platform is combined with fatigue analysis software fe-safe and crack extension experiments to predict the fatigue life of the tire.The research results show that the secondary developed FEA platform has greatly improved the efficiency of tire FEA while ensuring the analysis accuracy,and the tire FEA process which originally took 1 to 2 hours to complete only takes about 2 minutes to complete using the secondary developed FEA platform.The FEA platform is used to obtain the stress-strain results of the tire,and combined with the fatigue analysis software fe-safe to predict the fatigue life of the tire,and the validity of the predicted results is verified by tire durability test.The validation results show that the deviation of the simulation results is less than 10% compared with the endurance fatigue test,which can meet the fatigue life evaluation in the actual engineering design.This fatigue life calculation method is a very important guide for solving the actual engineering fatigue problems;and the construction of the FEA platform is of great significance for the promotion of FEA in tire applications and optimization of tire performance. |
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