Abstract:

     To mimic the cuticles of some typical soil animals, series biomimetic nonsmooth surface specimens with different unit shapes, distributed spaces and slopping angles were prepared by laser processing. The wear behaviors of the specimens under dry sliding were investigated. The results indicate that the biomimetic nonsmooth surface specimens possess better wear resistance than the untreated specimens. The specimen with grid nonsmooth units has the best wear resistance, the specimen with stria units takes the second and that with convex units is the worst. The wear resistance is enhanced by reducing the distributed spaces of the nonsmooth units. The wear resistance of the stria nonsmooth specimen with slopping angle of 45° is better than those with slopping angles of 0° and 90° respectively. The adhesive wear is the dominative wear mechanism.

Key words: bionics engineering, non , smooth surface, compact graphite cast iron, wear resistance, laser