Abstract:

The antierosion effects of different surface morphologies and their combinations were investigated by three dimensional finite element simulation using ANSYS/LSDYNA. The surface morphologies include smooth surface, surface with concave units, flexibility and smoothness, and coupling flexibility and concave. The equivalent stress during the erosion process was calculated. Results show that the calculated equivalent stress matches the actually measured wear loss very well. It is shown that appropriate selection of ANSYS/LSDYNA element types and a set of parameters can achieve different desired surface morphologies. Simulation results also show that the antierosion performances of the four surfaces are in the order: coupling flexibility and concave > flexibility and smoothness > surface with concave units > smooth surface. These results accord with experiment results well, indicating that three dimensional finite element simulation can predict surface antierosion performance.

Key words: engineering bionics, coupling bionics, erosion, nonlinear finite element analysis, ANSYS/LSDYNA, equivalent stress