Abstract:

The sand blasting erosion wear of samples with concave, flute and traffic circle bionic surface configurations was investigated by experiments. The optimal experimental design theory was employed and a three levels orthogonal table L27 (313) was adopted to arrange the experiments. Experimental data was processed by range analysis. The relationships between the erosion rate and the experimental factors, such as the rotation speed of sample, surface configuration, sand size (mesh) and blast rate, were obtained. The significances of the effects of these factors on the erosion rate are in the order: the sand mesh, rotation speed of sample, sand blast rate and surface configuration. The erosion rate increases with the rotation speed and sand mesh. Among all primary interactions, the effect of the interaction between configuration and sand blast rate on the erosion rate is the strongest one, while that between the sand mesh and rotation speed is the weakest one.

Key words: engineering bionics, bionic configuration, erosion abrasion, experiment optimum design, range analysis