Results 21 to 30 of about 5,816 (263)

Transitional behaviour between biphasic lubrication and soft elastohydrodynamic lubrication of poly(vinyl alcohol) hydrogel using microelectromechanical system pressure sensor

Biosurface and Biotribology, 2018
The soft hydrogel material is expected for a candidate material as biomimetic artificial cartilage with synergistic functionalities of adaptive multimode lubrication.
Nobuo Sakai, Seido Yarimitsu, Yoshinori Sawae, Mochimitsu Komori, Teruo Murakami   +4 more
doaj   +1 more source

Tribology of enzymatically degraded cartilage mimicking early osteoarthritis

Friction, 2023
Healthy cartilage is a water-filled super lubricious tissue. Collagen type II provides it structural stability, and proteoglycans absorb water to keep the cartilage in a swollen condition, providing it the ability to creep and provide weeping lubrication.
Ke Ren, Miguel Alejandro Reina Mahecha, Maike Hübner, Zhiwei Cui, Hans J. Kaper, Hugo C. van der Veen, Prashant K. Sharma   +6 more
doaj   +1 more source

Trimethylolpropane trioleate as eco-friendly lubricant additive

Engineering Science and Technology, an International Journal, 2022
Approximately 17.9% of fuel energy is used to overcome engine friction in passenger cars with engine frictional losses further broken down into losses along hydrodynamic (40%), elastohydrodynamic – due to pure sliding motion (40%), mixed (10%) and ...
Chiew Tin Lee, Mei Bao Lee, Siti Hartini Hamdan, William Woei Fong Chong, Cheng Tung Chong, Hedong Zhang, Allan Woei Loon Chen   +6 more
doaj   +1 more source

Rough Surface Contact Modelling—A Review

Lubricants, 2022
It has been shown experimentally that boundary friction is proportional to load (commonly known as Amontons’ law) for more than 500 years, and the fact that it holds true over many scales (from microns to kilometres, and from nano-Newtons to Mega-Newtons)
Robert Ian Taylor
doaj   +1 more source

Boundary lubrication:  Dynamics of squeeze-out [PDF]

Physical Review E, 2001
The dynamics of the expulsion of the last liquid monolayer of molecules confined between two surfaces (measured recently for the first time) has been analyzed by solving the two-dimensional Navier-Stokes equation combined with kinetic Monte Carlo simulations. Instabilities in the boundary line of the expelled film were observed.
Zilberman, S., Persson, B. N. J., Nitzan, A., Mugele, F., Salmeron, M.   +4 more
openaire   +4 more sources

Binding and lubrication of biomimetic boundary lubricants on articular cartilage [PDF]

Journal of Orthopaedic Research, 2016
ABSTRACTThe glycoprotein, lubricin, is the primary boundary lubricant of articular cartilage and has been shown to prevent cartilage damage after joint injury. In this study, a library of eight bottle‐brush copolymers were synthesized to mimic the structure and function of lubricin.
Kirk J, Samaroo, Mingchee, Tan, David, Putnam, Lawrence J, Bonassar   +3 more
openaire   +2 more sources

Boundary Lubrication Characteristic of Metal-Containing Diamond-Like Carbon (DLC) Films with Poly Alpha Olefin (PAO) Lubricant

Tribology Online, 2008
The effects of metals such as cobalt (Co), cerium (Ce), magnesium (Mg), nickel (Ni) and titanium (Ti) added to diamond-like carbon (DLC) films on boundary lubrication properties were investigated using a ball-on disk tribometer.
Shojiro Miyake, Mitsuyoshi Komiya, Wataru Kurosaka, Yasuaki Matsumoto, Yuta Saito, Yoshiteru Yasuda, Yusuke Okamoto   +6 more
doaj   +1 more source

Experimental and numerical study of the mixed lubrication under the action of magnetic ionic liquid additives

Scientific Reports
In this paper, the tribological characteristics of an oil-soluble magnetic fluid additive under mixed lubrication are studied by experiments and numerical simulation.
Ze Liu, Zhijun Yan, Shibo Wu, Haocheng Sun, Shengwei Zhang   +4 more
doaj   +1 more source

Effect of boundary slips on thermal EHL in simple sliding finite line contact considering limiting shearing stress

Friction
With the advancement of surface technology, boundary slip in lubrication has become increasingly common. However, theoretical analysis in this area remains limited, necessitating further research to explore the impact of boundary slip, particularly ...
Mingyu Zhang, Jing Wang, C. H. Venner
doaj   +1 more source

Low‐Cost, Large‐Scale Nanoporous Metals by Mechanical Alloying, Oxide Reduction, and Dealloying of Powders

Advanced Engineering Materials, EarlyView.
Powder metal processing provides scalable advantages in nanoporous (np) metal development. Mechanical alloying is used to produce unique precursors for hybrid nanopore formation by oxide reduction and dealloying. As demonstrated in np Ag, this approach improves process efficiency while promoting smaller ligaments and larger pores, both of which are ...
Mark A. Atwater, Oliver A. Fowler
wiley   +1 more source