Results 21 to 30 of about 850 (216)

Boundary lubrication with a glassy interface [PDF]

Physical Review E, 2004
Recently introduced constitutive equations for the rheology of dense, disordered materials are investigated in the context of stick-slip experiments in boundary lubrication. The model is based on a generalization of the shear transformation zone (STZ) theory, in which plastic deformation is represented by a population of mesoscopic regions which may ...
Lemaître, Anaël, Carlson, Jean
openaire   +3 more sources

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

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

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

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

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

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

Influence of Test Temperature and Test Frequency on Fatigue Life of Aluminum Alloy EN AW‐2618A

Advanced Engineering Materials, EarlyView.
The influence of test temperature and test frequency on the fatigue life of EN AW‐2618A is investigated. High‐cycle fatigue tests are performed at different test temperatures and frequencies on the 1000 h/230°C overaged state. Both test parameters reduce fatigue life due to time‐dependent damage mechanisms.
Ying Han, Julian M. Rosalie, Jan Radners, Mauro Madia, Philipp von Hartrott, Birgit Skrotzki   +5 more
wiley   +1 more source

Recycling of NiTi Shape Memory Alloys: Fundamental and Technological Aspects of a Vacuum Induction Melting Processing Route

Advanced Engineering Materials, EarlyView.
The present study investigates recycling of NiTi shape memory alloys via vacuum induction melting. An ingot was synthesized from elemental Ni and Ti and subjected to three subsequent remelting cycles. Remelting increases process durations and impurity levels and adversely affects microstructures and functional properties.
Sakia Sophia Noorzayee, Son Tung Mai, Sarath Menon, Braulio Gadiel Sánchez Ortega, Ralf Drautz, Alexander Kauffmann, Gunther Eggeler, Jan Frenzel   +7 more
wiley   +1 more source