Study On The Multiaxial Fatigue Properties And Life Prediction Of Cerium Oxide Filled Vulcanized Natural Rubber

Natural rubber is widely used in many fields well over a century such as vibration isolators,dampers,tires for the automotive/aircraft industry because of their superior properties.Natural rubber has the ability to dissipate energy and undergo large elastic deformation whilst maintaining excellent resistance to crack growth.However,fatigue failures commonly encountered in vulcanized natural rubber components remain a critical issue.In this study,focusing on cerium oxide filled vulcanized natural rubber effect on multiaxial fatigue life duration of vulcanized natural rubber,experimental tests were conducted using rubber dumbbell cylindrical specimens subjected to multiaxial fatigue experiment under different strain amplitudes or different loading paths.All fatigue experiments were carried out using a minitype-tension-torsional testing machine under constant displacement amplitude control.The effects of cerium oxide filled vulcanized natural rubber,different loading paths and different strain amplitude on fatigue life are discussed.The results show that the specimen behavior characteristic of cycle softening during initial hundreds of cycles.The effect is known as the Mullins effect of the rubber material.The multiaxial fatigue life of the specimen increases with the decrease of the strain amplitude under each loading path.Cerium oxide filled vulcanized natural rubber improves fatigue resistance of vulcanized natural rubber.The loading path has a great influence on the life of vulcanized natural rubber and there was a certain dispersion of results under three loading paths for cerium oxide filled vulcanized natural rubber.The existing fatigue life prediction models are evaluated with the experimental data for two materials.The CED model studies a plane-specific of energy gives better predicted results than the SED model.Approach based on critical plane results show that the SWT model and the CXH model all have good prediction results.A modified Fatemi–Socie's model the correlation coefficient is the highest,it is found that all data points fall within the bounds of a factor of two,and it can predict the fatigue life of two materials filled vulcanized natural rubbers very well.