Numerical analysis of friction and wear in steel under abrasion of a hard particle
Lúcia Sayuri Ando1; Luiz Gustavo Del Bianchi da Silva Lima1; Vanessa Seriacopi1; Izabel Fernanda Machado1; Roberto Martins de Souza1
1 University of Sao Paulo
doi:10.20906/CPS/COB-2015-2367
Resumo
In several manufacturing processes, such as rolling and forging, tool wear and friction between tool and workpiece are factors that affect important characteristics of the final products, like geometry and surface finishing. Thus, it is interesting to investigate in which conditions tool wear is favored and to anticipate the tangential loads that can occur in metal-metal contact. The techniques applied in this type of study include the finite element analysis, which provides the calculation of contact stress distribution, and allows the investigation of a reasonable group of variables, such as geometry of the parts in contact and loads. This work intends to present two-dimensional finite element models that simulate the sliding of a rigid pin over a softer elastic-plastic surface. In each of the analyses, displacements are imposed to the pin, such that it first indents and then slides over the workpiece with constant penetration depth. Displacement of workpiece material is considered throughout the simulations. The main input variable of the analyses is the penetration depth, which influences several outputs of the model, like contact stress distributions and normal and tangential loads that arise from the pre-imposed displacements. Therefore, it is possible to calculate the ratio between tangential and normal loads, commonly defined as friction coefficient. Results indicate a transition in surface behavior as the penetration depths increase.
Palavras-chave: Finite element; Friction; Wear; Indentation; Abrasion