Reserch on the mechanical-properties of flexible surface-material by erosion in Sandstorm-Environment

Now more flexible materials are used as the infrastructure surface coating that is an important part of the durability of protection facilities. Sandstorm-Environment has great influence on the durability of those coating by erosion and deterioration. In this paper, based on analysis of characteristics of sandstorm-environment and the mechanical properties of the flexible material of the coating, the erosion mechanical model of the flexible material is established, and the erosion mechanical properties are analyzed. The results show that the quantitative relationship between max-contact force, max-contact radius, max-contact stress of the coating and erosion speed and angle, and distribution regular of stress-field and yield speed limit of the flexible material can be found. The erosion-wear process is simulated by means of finite element program, which show that the simulate results conform to theoretical analysis and calculation results. The research will provide valuable basis for revealing the erosion-mechanism and exactly evaluating durability of the flexible materials.