High-temperature Wear Mechanism Of Rubber Materials:Experiment And Simulation

With the development of automotive industry and aerospace industry,the speed and load of automobiles and airplanes is bigger and bigger,thus the requirement of ability for tires to resist wear is becoming higher and higher.Especially when the high loading plane lands at a high speed,there always be the phenom enon of "smoke",leaving a black mark on the road.And tires will generate lots of heat in a short time and their temperature will rise fast.At the same time,rubber composite mechanical properties(strength,adhesive performance)will decrease.It is a potential safety hazard for traffic accidents when the tire is working at a high temperature for a long period of time.However,the current researches on the wear properties of rubber materials are mainly confined to the normal temperature.Therefore,adopting the method of combining experimental research and theoretical analysis,this paper researches the wear characteristics under different temperature using the finite element analysis technology systematically.There will be important theoretical significance and application value to improve the quality and the service life of rubber products.First,research on high temperature wear of tread rubber materials.Based on the working principle of the abrasion taster,the mathematical model is established and the foundation of finite element analysis is established.To improve the Akron abrasion test of the high temperature and carry out the abrasion test,study the effect of the material formula,the environment temperature,the mileage and the Angle on the abrasion performance of the rubber material;To be able to focus on the influence of temperature,design the variable temperature abrasion test,structure,tire wear surface temperature rise test platform,the further study on the effect of surface temperature on the wear performance.Secondly,the mechanism of high temperature wear of rubber material is analyzed.The surface of rubber wheel wear under different temperature and Angle is studied by using optical electron microscope.The morphological characteristi cs of rubber grinding debris under different temperature and angle is studied by using the MATLAB image processing technology to get the shape factor.According to the study of the two,reveals the high temperature wear mechanism of rubber materials.Using the friction test device of rubber material,studies the rubber wheel wear surface morphology of the variety of the friction coefficient,and when rubber material does not have abrasion,influence of the contact pressure,velocity and friction pair in the face on the friction coefficient are studied.The friction coefficients of rubber materials provide boundary conditions for finite element analysis.Finally,going on finite element analysis of rubber wheel wear.To modify the model of rubber material,and carry out high and low temperature uniaxial tensile compression test.To establish the steady-state rolling model of the rubber wheel and grinding wheel and validate it.By this model,analyze the influence of the coefficient of constant friction and coefficient of variational friction under different temperature and angle to the contact pressure and the footprint about the rubber wheel.Based on the results of the experiment and simulation,establish the prediction model of the rubber wear considering the temperature.According to this model,and simulate the variation with distance of the surface profile of the rubber wheel and analyze the effecct of different surface profile on the contact characteristics of rubber wheel.