Results 81 to 90 of about 386,992 (300)

Bio‐Inspired Molecular Events in Poly(Ionic Liquids)

Advanced Functional Materials, EarlyView.
Originating from dipolar and polar inter‐ and intra‐chain interactions of the building blocks, the topologies and morphologies of poly(ionic liquids) (PIL) govern their nano‐ and micro‐processibility. Modulating the interactions of cation‐anion pairs with aliphatic dipolar components enables the tunability of properties, facilitated by “bottom‐up ...
Jiahui Liu, Marek W. Urban
wiley   +1 more source

Frictional and morphological characteristics of ion plated soft, metallic films [PDF]

Ion plated metallic films in contrast to films applied by other deposition techniques offer a lower friction coefficient, longer endurance lives and exhibit a gradual increase in friction coefficient after the film has been worn off.
Buzek, B., Spalvins, T.
core   +1 more source

Non-monotonic dependence of the friction coefficient on heterogeneous stiffness

, 2014
The complexity of the frictional dynamics at the microscopic scale makes difficult to identify all of its controlling parameters. Indeed, experiments on sheared elastic bodies have shown that the static friction coefficient depends on loading conditions,
Ciamarra, Massimo Pica, de Arcangelis, Lucilla, Giacco, Ferdinando, Lippiello, Eugenio, Saggese, Luigi   +4 more
core   +2 more sources

Fluorine‐Free Soft Nanocomposites for High‐Speed Liquid Impact Repellence

Advanced Functional Materials, EarlyView.
Fluorine‐free soft nanocomposite coatings are developed using silicone oil‐mediated mechanical‐stiffness control, enabling ‘dry’ liquid‐repellent surfaces that resist high‐speed water jet impacts up to ∼60 m/s. By tuning nanoparticle loading and oil content, the coatings also achieve >90% optical transparency, amphiphobicity with impact resistance to ...
Priya Mandal, Vikramjeet Singh, Rohit Gupta, Prasenjit Kabi, Manish K. Tiwari   +4 more
wiley   +1 more source

Experimental Analysis on Friction Characteristics of MW Wind Turbine Generator Yaw Braking System

南方能源建设
[Objective] The wind turbine generator (WTG) yaw braking system has application in low-pressure yaw and high-pressure heavy load, and the friction performance between friction pairs is influenced by various parameters between the components of the yaw ...
Ming LIU, Xuebing YANG, Xuewen ZHANG, Zhenrong HUANG, Zhongjie BU   +4 more
doaj   +1 more source

Friction dependence of shallow granular flows from discrete particle simulations [PDF]

, 2011
A shallow-layer model for granular flows is completed with a closure relation for the macroscopic bed friction or basal roughness obtained from micro-scale discrete particle simulations of steady flows. We systematically vary the bed friction by changing
Bokhove, Onno, Luding, Stefan, Thornton, Anthony, Weinhart, Thomas   +3 more
core   +2 more sources

Conductive Bonding and System Architectures for High‐Performance Flexible Electronics

Advanced Functional Materials, EarlyView.
This review outlines bonding technologies and structural design strategies that support high‐performance flexible and stretchable electronics. Bonding approaches such as surface‐activated bonding and anisotropic conductive films, together with system‐level architectures including buffer layers and island‐bridge structures, possess distinct mechanical ...
Kazuma Nakajima, Kenjiro Fukuda
wiley   +1 more source

Density fluctuations from warm inflation

, 2009
Thermal fluctuations provide the main source of large scale density perturbations in warm inflationary models of the early universe. For the first time, general results are obtained for the power spectrum in the case when the friction coefficient in the ...
A. Berera, A. Einstein, A. Erdelyi, A.R. Liddle, Chris Graham, D.H. Lyth, I.G. Moss, I.G. Moss, I.G. Moss, I.G. Moss, Ian G Moss, J.-C. Hwang, L.M.H. Hall, L.V. Keldysh, L.V. Keldysh, S. Weinberg   +15 more
core   +1 more source

MAGTWIST: A Magnetically‐Driven Rotary Actuator Using a Traveling‐Wave With Integrated Stiffness Tunability

Advanced Functional Materials, EarlyView.
MAGTWIST: A compact magnetic rotary actuator, enabling smooth, stepless rotation, and on‐demand locking. Inspired by peristalsis, a soft polymer belt generates a traveling‐wave, enabling 270° rotation when heated. Cooling stiffens the belt, locking it in position and enabling it to withstand high loads.
Simon Frieler, Jean‐Paul P.M. de Vries, Sarthak Misra, Venkatasubramanian Kalpathy Venkiteswaran   +3 more
wiley   +1 more source

The wheel-rail contact friction influence on high speed vehicle model stability [PDF]

Transport Problems, 2015
Right estimating of the coefficient of friction between the wheel and rail is essential in modelling rail vehicle dynamics. Constant value of coefficient of friction is the typical assumption in theoretical studies.
Mirosław DUSZA
doaj