Title: Study of tribological performances of compound dimples based on diatom shell structures

Authors: Fanming Meng; Tingting Li

Addresses: The State Key Lab of Mechanical Transmission, Chongqing University, Chongqing, 400044, China ' The State Key Lab of Mechanical Transmission, Chongqing University, Chongqing, 400044, China

Abstract: Influences of compound dimples, based on representative diatom shell structures, on tribological performances of parallel sliding surfaces are investigated with fluid-solid interaction (FSI) method. In doing so, compound dimples with two-level structures are modelled by imitating the multi-level pore structures of a diatom shell and then their tribological performances are solved with FSI method. Further, tribological performances are compared between compound and simple dimples, and among different compound dimple shapes. The numerical results show that the compound dimple can be preferable to the simple dimple in improving tribological performances of textured surfaces. Moreover, the cuboidal-spherical dimple can better enhance the load-carrying capacity and reduce friction of lubricant.

Keywords: tribological performances; compound dimples; tribology; diatom shell structures; fluid-solid interaction; FSI; parallel sliding surfaces; pore structures; textured surfaces; load carrying capacity; lubricant friction.

DOI: 10.1504/IJSURFSE.2015.072834

International Journal of Surface Science and Engineering, 2015 Vol.9 No.6, pp.538 - 560

Received: 31 Oct 2014
Accepted: 09 Nov 2014
Published online: 04 Nov 2015 *

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