The size effect of hexagonal texture on tribological properties under mixed lubrication

Abstract

Purpose

The purpose of this study is to elucidate the size effect (groove width, unit length and area density) of the hexagonal texture on tribological properties under lubrication.

Design/methodology/approach

The tribological properties of nine hexagonal textures with different hexagon lengths and groove widths have been investigated under mixed lubrication to elucidate the size effect.

Findings

Overall, the friction coefficient decreases as the groove width increases within the examined range, whereas the hexagon length shows an optimal value around 3 mm. In particular, one hexagonal texture (3 × 3 mm) exhibits lower friction coefficients and less wear losses than the others. Interestingly, two hexagonal textures of similar area density (1 × 1 mm and 3 × 3 mm) yield the worst and best tribological performances, respectively, which can be explained by the simulated distribution of equivalent stress.

Originality/value

The tribological properties of nine hexagonal textures are examined under lubrication. The 3 × 3 texture exhibits lower friction coefficient and wear loss than the others. Two textures of similar area density yield the worst and best tribological performances. The results agree with the simulated distribution of equivalent stress.

Citation

Zheng, L., Gao, Y., Zhong, Y., Lu, G., Liu, Z. and Ren, L. (2018), "The size effect of hexagonal texture on tribological properties under mixed lubrication", Industrial Lubrication and Tribology, Vol. 70 No. 9, pp. 1798-1805. https://doi.org/10.1108/ILT-12-2017-0391