A fatigue life prediction method for rubber materials and products was proposed based on the theory of large deformation fatigue of rubber.This method mainly included two steps:fitting the rubber hyperelastic constitutive model and joint simulation of finite element analysis and fatigue simulation.The Mooney-Rivilin constitutive model material parameters were obtained by fitting the experimental data of uniaxial tensile fatigue of rubber materials through least squares method.The CIAC-SAFE fatigue simulation software with independent intellectual property rights have been developed,and the fatigue life of dumbbell shaped rubber sheets under uniaxial tensile conditions was predicted through a combination of material parameters and open-source finite element simulation software.The accuracy of the joint simulation method was verified by comparing with experimental results.By using static simulation data to equivalently calculate the load history under steady-state rolling conditions,the large deformation fatigue theory method was applied to predict the fatigue life of the V-belt model and rubber tire model under steady-state rolling conditions.Based on the predicted results,optimization suggestions were proposed for the structural design of the rubber belt continuously variable transmission(CVT)and rubber tire.This indicates that this method can be applied in the early stage of rubber product design,to save time and cost for product development,and to provide theoretical reference for a deeper understanding of rubber material fatigue and failure.
finite element simulationfatigue simulationlarge deformation fatigue theoryconstitutive model
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