Experimental Investigation On The Morphology Of The Tire Wear Particles And Its Generation Mechanism

Tire wear particle(TWP)is generated by friction and wear between tire and ground and dispersed from the tread-road interface to the atmosphere,soil and river.TWP is the secondary hazard of tire wear and is harmful to the human health and biology living,which also contributes to the frog generation and soil pollution.Therefore,it is important to investigate the mechanism of TWP generation and its relationships to the features of TWP.Firstly,tire wear particles were collected by a newly developed test rig.The size and morphology of individual wear particle as well as surface topography was investigated via optical microscope and scanning electron microscope(SEM).The characteristics of the morphology and size distribution of tire wear particles were summarized.Secondly,the tire wear tests were carried out under operating condition variation.The features of TWP and tire wear tread were both observed utilizing optical microscope and scanning electron microscope(SEM).The relationship between wear particles and tread wear patterns were explored.Orthogonal test with three factors and three levels were carried out to investigate the influence of operating parameters on the TWP of which size are smaller than 10 um.Finally,the effects of tire wear resistance,road surface roughness and ambient humidity on wear particles were investigated.The morphology and grain size of TWP and wear tread morphology in different working conditions were explored and discussed.The schematic of wear mechanism were plotted to explain the generation of wear particles in a simple and straightforward manner.Furthermore,the relationship between wear particles and the mentioned parameters were established.The study will provide theoretical guidance for reducing the secondary hazards of wear debris caused by tire wear,and will promote the theory development of wear secondary hazard control of viscoelastic rolling objects.It is theoretically important to enrich the tribology and surface interface science of viscoelastic rolling elements.