Small end bearings are a critical component of reciprocating engines, and the performance their lubrication directly affects engines’ reliability mechanical efficiency. There many factors that influence lubrication. A new type small-end bearing test rig was developed to reveal key influencing on characteristics, multi-body dynamic model coupled with elastohydrodynamic (EHD) characteristics buil...

This paper reports a fundamental study of lubricant film formation with model synovial fluid components (proteins) and bovine serum (BS). The objective was to investigate the role of proteins in the lubrication process. Film thickness was measured by optical interferometry in a ball-on-disc device (mean speed range of 2-60 mm/s). A commercial cobalt-chromium (CoCrMo) metal femoral head was used...

As a first step toward the interpretation of dynamic light scattering with evanescent illumination from suspensions of interacting spheres, in order to probe their near wall dynamics, we develop a theory for the initial slope of the intensity autocorrelation function. An expression for the first cumulant is derived that is valid for arbitrary concentrations, which generalizes a well-known expre...

[1] Sea ice friction models are necessary to predict the nature of interactions between sea ice floes. These interactions are of interest on a range of scales, for example, to predict loads on engineering structures in icy waters or to understand the basin‐scale motion of sea ice. Many models use Amonton’s friction law due to its simplicity. More advanced models allow for hydrodynamic lubricati...

The stability of liquid films on moving fibers is studied with a focus on effects caused by film-solid adhesion interactions and hydrodynamic interactions between the film and the surrounding gas. We show that at high fiber velocities (large Reynolds numbers) the film-gas hydrodynamic interactions induce instability in films, which would, otherwise, be stabilized by the adhesion interactions at...

Surface texture plays an important role in improving the tribological properties of materials. In this paper, effect different shapes (i.e., triangle, square, hexagon, round) on performance cross-grooved was investigated. First, mixed lubrication condition used for pin-on-disc rotating sliding tests. Then, stress distribution four textures analyzed to better explain experimental results. Overal...

When a rigid object approaches soft material in viscous fluid, hydrodynamic stresses arise the lubricated contact region and deform material. The elastic deformation modifies turn flow, hence generating soft-lubrication coupling. Moreover, elastomers gels are often porous. These materials may be filled with solvent or uncrosslinked polymer chains, might permeable to surrounding which complexifi...