In this study, the tapered roller bearing was adopted to explore effect of manganese phosphate coating on friction, wear, and lifespan bearings. Line friction samples with without a were prepared. The White Light Interferometry used analyze three-dimensional morphology roughness, Optimal Schwing–Reib–Verschleiss-5 multifunctional wear tester applied obtain tribological parameters before after a...

Metal-on-ultra-high molecular weight polyethylene (UHMWPE) total hip replacements have been the most popular and clinically successful implants to date. However, it is well documented that the wear debris from these prostheses contributes to osteolysis and ultimate failure of the prosthesis, hence alternative materials have been sought. A range of 28 mm diameter bearings were investigated using...

Negative skin friction occurs when concrete piles are situated in soft soils, consolidating soilmass, etc., resulting in a downward force that increases loading on shaft piles and reduces the bearing capacity of the piles. A new concept based on the shifting rate of piles, and the settlement rate of the surrounding soils has been suggested far the study of negative skin friction. Negative skin ...

We present a classical rolling contact apparatus where two discs roll and slide under a constant normal loading. Experimental results concerning bearing steel used in ambient air or under severe temperature conditions (Liquid Nitrogen) are presented. A simplified model proposed by Kalker (Fastsim) is used to identify the dynamic friction coefficient between these discs and to study the apparatu...

The prediction of the ultimate bearing capacity of the pile under axial load is one of the important issues for many researches in the field of geotechnical engineering. In recent years, the use of computational intelligence techniques such as different methods of artificial neural network has been developed in terms of physical and numerical modeling aspects. In this study, a database of 100 p...

The article describes the influence of tribological characteristics phenanthrene liquid crystalline substance (as an additive to hydraulic oils) on service life units technological machines (e. g. construction and track machines). It demonstrates that creates cholesteric lubricating films friction surfaces. have a high bearing capacity low in their layers, which significantly improves lubricity...