Experimental And Simulation Study On The Evolution Of Schallamach Waves In Rubber Materials

Rubber friction is a common problem in life and production,such as tire tread wear,seal rubber surface slip,sole wear and tank rubber wheel friction.The friction between rubber and other materials exhibits a bond-slip behavior,especially for softer rubber materials,with a special wave-like deformation on the surface accompanied by a bondslip behavior,also known as a Schallamach wave.These waves can cause singular wear of the material,mechanical additional vibration,seal leakage and mechanical noise,etc.,and can also be used to construct and control the surface topography of the material.Therefore,studying the influencing factors and simulation methods of frictional Schallamach wave of rubber materials,clarifying the behavior and mechanism of frictional Schallamach wave of rubber materials,it is of great scientific and engineering significance for the development and application of flexible electronics,bio-rubber materials and traditional engineering rubber materials.In this paper,experimental materials with different mechanical properties were prepared,and the experimental platform needed for the experiment was built.The friction experiments under different conditions were carried out,and the evolution law of Schallamach wave was revealed.The three-dimensional simulation of Schallamach wave was completed for the first time.The main work includes the following:First of all,the work of experimental material preparation and mechanical properties characterization and construction of experimental platform was carried out.PDMS with different mechanical properties was prepared as experimental materials by adjusting the material ratio.Uniaxial tensile tests and DMA relaxation experiments were carried out on the experimental materials to characterize their superelasticity and viscoelasticity.The experimental data were fitted to different models,and the best constitutive model was selected.With reference to the classical experimental setup,the Schallamach wave friction experimental platform required for the experiment was designed and constructed.Secondly,the evolution law of frictional Schallamach waves under different conditions is quantitatively studied.The frictional experiments of different slip speed,compression and rubber materials were carried out.The surface topography of Schallamach wave and the critical slip velocity of wave appeared under different slip speeds.The waveforms and slip speeds of four frictional forces were revealed.The correspondence between the slip velocity and the maximum static friction force is established,and the laws of wave velocity,wavelength,wave number and contact area with the slip velocity,compression amount and material ratio are obtained,and the relationship model is established.Finally,the two-dimensional and three-dimensional friction simulation of Schallamach wave is carried out.By two-dimensional simulation of Schallamach wave friction,the evolution of the first wave appearance time,propagation time,wave number and wave velocity is revealed.The critical compressive strain of Schallamach wave is 0.35,which is consistent with the reported results.The three-dimensional simulation of Schallamach wave was established for the first time,and the characteristic changes of shape,friction and wave velocity were obtained.The reliability of the three-dimensional analysis results was verified by comparison with the experimental results,and the stress state of the rubber material during the friction process was revealed.