Study On Fatigue Life Prediction Of Rubber Elastic Components Of High Elastic Coupling

Compared with the rigid coupling,the high elasticity coupling can play not only a basic driving role,but also a role in reducing vibration and noise.It plays an increasingly important role in the production and life.Therefore,it is of great significance to study its service life and form an effective fatigue life prediction method for product optimization and ensuring safe production.Because of the complex fatigue mechanism of rubber materials,the study of the fatigue life of rubber materials and rubber components is not mature at present.The study of the fatigue life of rubber components is mainly focused on small deformation rubber components such as shock absorbers under tension and compression loads,while the fatigue life of high elastic coupling with large deformation characteristics under torsional loads has hardly been studied.In order to solve this problem,based on FE-SAFE/ABAQUS software platform,the fatigue life of LS1210 high elastic coupling is predicted,and an effective method for predicting the fatigue life of high elastic coupling is proposed.The work carried out mainly includes the following aspects:1.The prediction methods of rubber fatigue life were studied:The damage characteristics of rubber components,rubber materials and the fatigue life research methods of rubber materials and rubber products at home and abroad were studied.According to the bearing characteristics of LS1210 high elastic coupling,the fatigue life of LS1210 high elastic coupling is predicted by using S-N curve based on material test and finite element method.2.The performance test of rubber material was carried out:Firstly,according to the characteristics of torsional stress of high elastic coupling,the simple shear and uniaxial tension tests of rubber material were carried out,and the data of six commonly used hyperelastic constitutive models were fitted by ABAQUS finite element software,through which quadratic polynomial constitutive model as the research object is finally determined for subsequent simulation calculation.Secondly,the fatigue tests of rubber materials were designed by using the group test method of standard dumbbell specimens.The strain-cycle number data of rubber materials were obtained,and the corresponding S-N curves were drawn by using software.3.The simulation analysis and fatigue life prediction of rubber elastic components of high elastic coupling are carried out.A simplified model of the research object is established by using ABAQUS.The stress and strain distribution of the coupling structure is obtained by calculating the dynamic mechanics of the rubber elastic element.Based on FE-SAFE fatigue analysis software,the fatigue life of the research object is calculated by using the stress-strain relationship obtained by finite element simulation,S-N curve obtained by experiment and normal load condition of the coupling.The fatigue life cloud of the component is obtained by using the visualized post-processing of the finite element software.4.The accelerated fatigue test of coupling products was designed and carried out:Based on the standard of fatigue test and the principle of accelerated fatigue test,the accelerated fatigue test of the product is designed and carried out,and then the calculation results of fatigue life are evaluated according to the actual application of the product.The result of fatigue life calculation meets the requirement of fatigue life accuracy in engineering,so the fatigue life prediction method proposed in this paper is effective.The fatigue life prediction method and accelerated fatigue life test method of rubber element high elastic coupling proposed in this paper are the similar as that of other types of rubber element high elastic coupling.