Improved Design Of Tire Structure Based On Thermal Fatigue Life

The working conditions of radial tires of trucks are relatively harsh,and their fatigue life has a great impact on the safety of the entire vehicle.As a complex rubber product,there are many factors affecting the fatigue life of a tire.At present,there is no set of uniform fatigue life estimation standards.Tire companies mainly rely on design experience to design tires.After simple finite element analysis and verification,mileage tests are performed to obtain tire fatigue life.In order to improve the tire design scheme,the corresponding tire life results must first be obtained.The current finite element analysis of tire life has a long process,complicated operation,and is completely based on the analysis experience of researchers.The accuracy of the results is difficult to assess.In order to quickly improve the tire design plan,based on the previous research results of the research group,this paper independently compiled a tire finite element analysis platform based on the tire finite element analysis process and thermal fatigue theory,through Python programming and ABAQUS secondary development.Through this platform,the tire life result corresponding to the scheme can be quickly obtained,then the design scheme can be modified and verified based on these results,and finally the improved design of the tire structure to increase the tire's fatigue life can be achieved.Based on the analysis platform developed,one type of tire from an enterprise was analyzed and improved.The thermal fatigue life of the tires in two different design schemes was studied,it was found that the height of the lower apex has a greater impact on the tire fatigue life.The coverage range of the bead nylon cover cloth was changed,and two other improved design schemes were given.After analysis and calculation,a tire design scheme with a longer life was obtained.Finally,the accuracy of the analysis results was verified through several tire drum tests.The work of this thesis has high application value and reference significance for the product design and development of tires and related industries.