Results 121 to 130 of about 14,864 (294)

Kinetic friction due to Ohm's law heating [PDF]

Journal of Physics: Condensed Matter, 2002
Using both a recent calculation by Bruch of the damping of the motion of a monolayer nitrogen film oscillating harmonically on a metallic surface due to Ohm's law heating and a Thomas-Fermi approximation treatment of the Ohm's law heating mechanism, which accounts for the nonzero thickness of the surface region of a metal, it is argued that this ...
openaire   +2 more sources

Sticky Yet Slippery: Molecular Ordering Reconciles Bubble‐Surface Affinity With Ultralow Friction at the Nanoscale

Advanced Science, EarlyView.
By engineering the molecular order and thickness of PDMS layers, we reconcile the stickiness and slipperiness during bubble transport. AFM measurements and MD simulations further reveal how these nanoscale architectures tune hydrophobic interaction FHB and friction force f.
Shishuang Zhang, Jiajun Li, Huadong Tian, Zhoujie Wang, Chenyu Qiao, Jingyi Wang, Lei Xie, Hongbo Zeng   +7 more
wiley   +1 more source

ON THE EFFECT OF SPEED ON THE KINETIC FRICTION OF SOME PLASTIC MATERIALS ON ICE

, 1956
Curves are shown illustrating the effect of speed on the friction of teflon, bakelite, nylon, terylene, plexiglas (perspex), cellulose acetate, polystyrene, and polyethylene, sliding on ice at −5 °C. and −15 °C.
C. D. Niven
core   +1 more source

Stress‐to‐Light Conversion in an Earth‐Abundant Oxide Semiconductor

Advanced Science, EarlyView.
Stress‐to‐light conversion in solids represents a unique photonic functionality, yet it has never been realized in a chemically simple and sustainable material. Here, we show that sustainable semiconductor ZnO exhibits strong near‐infrared (NIR) luminescence under elastic stress when defect‐engineered to stabilize the p‐type state.
Tomoki Uchiyama, Koki Otonari, Reona Omori, Guangfa Yang, Eiji Nishibori, Ying Chen, Xu‐Guang Zheng, Chao‐Nan Xu   +7 more
wiley   +1 more source

Kinetic friction force in a three-layer model with commensurate substrates

, 2020
A chain of harmonically interacting particles confined between two sinusoidal substrate potentials has been analysed. When the top substrate is driven through an attached spring with a constant velocity, the influence of the system parameters on the ...
Tekić, Jasmina, Jia, Li-Ping
core   +1 more source

Synovial Fluid Lubricant Properties Are Transiently Deficient After Arthroscopic Articular Cartilage Defect Repair With Platelet-Enriched Fibrin Alone and With Mesenchymal Stem Cells

Orthopaedic Journal of Sports Medicine, 2014
Background: Following various types of naturally occurring traumatic injury to an articular joint, the lubricating ability of synovial fluid is impaired, with a correlated alteration in the concentration and/or structure of lubricant molecules ...
Murray J. Grissom MS, Michele M. Temple-Wong PhD, Matthew S. Adams BS, Matthew Tom BS, Barbara L. Schumacher BS, C. Wayne McIlwraith DVM, PhD, Laurie R. Goodrich DVM, PhD, Constance R. Chu MD, Robert L. Sah MD, ScD   +8 more
doaj   +1 more source

Unraveling the Power of Disorder: A Bioinspired Cuttlebone Structure With Superior Strength, Energy Absorption and Isotropy

Advanced Science, EarlyView.
Cuttlebone‐inspired architected metamaterials introduce controlled structural disorder to simultaneously enhance strength, energy absorption, and compressive stability. Tunable disorder suppresses shear anisotropy, outperforms periodic lattices, and establishes discrete randomness as a robust route to high‐performance lightweight mechanical ...
Zengqin Shi, Peng Jiang, Xiaoyan Zhu, Suyun Li, Wenqing Wang, Tian Zhao, Rujie He, Ying Li   +7 more
wiley   +1 more source

A Data‐Driven Inverse Design Methodology for Magnetic Soft Millirobots Navigating in Confined Spaces

Advanced Science, EarlyView.
A data‐efficient inverse design framework automates the optimization of magnetic soft millirobots for confined‐space navigation. Integrating a physics‐based Cosserat rod model with Bayesian optimization efficiently identifies high‐performance geometries.
Ziyu Ren, Hong Wang, Chak Wang Tse, Yi Zheng, Xi Chen, Wenqi Hu   +5 more
wiley   +1 more source

Model-based estimation of AMT vehicle clutch kinetic friction coefficient

, 2018
Driving performance and fuel economy are two important factors that attracts customers choosing certain type of vehicles. Those two factors can be improved largely by adopting optimized transmission gear-shifting strategy.
He, Yu (Graduate of Michigan State University)
core   +1 more source

Effect of friction on levelling of the maxillary canine with NiTi superelastic wire - an in silico experiment using a finite element method

Clinical and Investigative Orthodontics
Purpose To clarify the effect of friction on the levelling process using a NiTi superelastic wire, the levelling process was simulated using a finite element method.Materials and methods The maxillary right canine, which was intruded by 2 mm, was ...
Rikou Miyawaki, Yukiko Yokoi
doaj   +1 more source