Results 61 to 70 of about 155,826 (284)

Self-Organization and Friction During Sliding [PDF]

ASME/STLE 2012 International Joint Tribology Conference, 2012
In self-organized sliding processes, the surfaces align to each other during sliding. This alignment leads to a more ordered contact state and significantly influences the frictional behavior. To understand the self-organization sliding processes, experiments were conducted on a pin-on-plate reciprocating sliding tester for various numbers of cycles ...
Menezes, Pradeep L, Kishore, *, Kailas, Satish V, Lovell, Michael R   +3 more
openaire   +2 more sources

A Biologically‐Architected Wear and Damage‐Resistant Nanoparticle Coating From the Radular Teeth of Cryptochiton stelleri

Advanced Functional Materials, EarlyView.
The ultrahard teeth of mollusks that feed on rocky substrates contain a wear‐resistant coating on their surfaces consisting of densely packed mesocrystalline magnetic nanoparticles within an organic matrix. These coatings display significant hardness and toughness through their highly controlled mesocrystalline architectures.
Taifeng Wang, Yu Chen, Ezra Sarmiento, Taige Hao, Atsushi Arakaki, Michiko Nemoto, Pablo Zavattieri, David Kisailus   +7 more
wiley   +1 more source

Ab-initio friction forces on the nanoscale: A DFT study of fcc Cu(111)

, 2014
While there are a number of models that tackle the problem of calculating friction forces on the atomic level, providing a completely parameter-free approach remains a challenge.
Feldbauer, Gregor, Mohn, Peter, Redinger, Josef, Vernes, András, Wolloch, Michael   +4 more
core   +2 more sources

Toughening β‐Ga2O3 via Mechanically Seeded Dislocations

Advanced Functional Materials, EarlyView.
β‐Ga2O3 is promising for next‐generation semiconductors but its brittleness limits flexible and high‐precision applications. Here, mechanically seeded dislocations introduced by surface deformation improved damage tolerance in (001) β‐Ga2O3. Nanoindentation and characterization show dislocations suppress cleavage cracks by enabling stable plastic ...
Zanlin Cheng, Jiawen Zhang, Peng Gao, Guosong Zeng, Xufei Fang, Wenjun Lu   +5 more
wiley   +1 more source

Analysis of Wear Process of Mechanical System “0.45% Carbon Steel – Polytetrafluorethylene” during Sliding and Mechano-Sliding Fatigue Using Fracture Mechanics Criterion

Механика машин, механизмов и материалов, 2019
The results of the tests for a friction pair “a cylindrical specimen made of 0.45% carbon steel — a prismatic counterspecimen-liner made of polytetrafluoroethylene F4-B” during sliding friction and mechano-sliding fatigue at different levels of contact ...
Alexander V. Bogdanovich
doaj  

The Puzzling Collapse of Electronic Sliding Friction on a Superconductor Surface

, 1998
In a recent paper [Phys. Rev. Lett. 80 (1998) 1690], Krim and coworkers have observed that the friction force, acting on a thin physisorbed layer of N_2 sliding on a lead film, abruptly decreases by a factor of ~2 when the lead film is cooled below its ...
B.N.J Persson, Cieplak, Dayo, E Tosatti, Krim, Krim, Persson, Persson, Persson, Persson, Persson, Sokoloff, Tomassone, Tomassone   +13 more
core   +1 more source

Use of elastic stability analysis to explain the stress-dependent nature of soil strength [PDF]

, 2015
The peak and critical state strengths of sands are linearly related to the stress level, just as the frictional resistance to sliding along an interface is related to the normal force. The analogy with frictional sliding has led to the use of a ‘friction
Hanley, KJ, Huang, X, O'Sullivan, C, Wadee, MA   +3 more
core   +3 more sources

Theory of rubber friction:  Nonstationary sliding [PDF]

Physical Review B, 2002
When rubber slides on a hard, rough substrate, the surface asperities of the substrate exert oscillating forces on the rubber surface leading to energy ``dissipation'' via the internal friction of the rubber. In this paper we extend an earlier published theory [B.N.J. Persson, J. Chem. Phys.
Persson, B. N. J., Volokitin, A. I.
openaire   +2 more sources

Geometry‐Dependent Adhesion in Transparent Monodomain Liquid Crystal Elastomers

Advanced Functional Materials, EarlyView.
Liquid Crystal Elastomers (LCEs) are emerging as exciting pressure‐sensitive adhesives. We examine adhesion in chemically identical elastomer films, exploring the influence of geometry (director orientation) and phase (nematic or isotropic). We demonstrate the potential of these aligned films as transparent, tunable, broad‐temperature‐range smart ...
Aidan Street, Devesh Mistry, Johan Mattsson, Helen F. Gleeson   +3 more
wiley   +1 more source

Velocity dependence of friction of confined polymers [PDF]

, 2009
We present molecular dynamics friction calculations for confined hydrocarbon solids with molecular lengths from 20 to 1400 carbon atoms. Two cases are considered: (a) polymer sliding against a hard substrate, and (b) polymer sliding on polymer.
Persson, B. N. J., Samoilov, V. N., Sivebaek, I. M.   +2 more
core   +1 more source