Results 91 to 100 of about 430,766 (349)
Rotor internal friction instability [PDF]
Two aspects of internal friction affecting stability of rotating machines are discussed. The first role of internal friction consists of decreasing the level of effective damping during rotor subsynchronous and backward precessional vibrations caused by ...
Bently, D. E., Muszynska, A.
core +1 more source
Internal Friction and Vulnerability of Mixed Alkali Glasses
, 2005 Based on a hopping model we show how the mixed alkali effect in glasses can be understood if only a small fraction c_V ofthe available sites for the mobile ions is vacant. In particular, we reproduce the peculiar behavior of the internal friction and the
C. T. Moynihan +10 more
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Sustainable Catalyst‐Free PLG Networks: Recyclability, Biodegradability, and Functional Performance
Advanced Functional Materials, EarlyView.A catalyst‐additive free covalent adaptable network is developed from star‐shaped poly(lactide‐co‐glycolide) cross‐linked with pyromellitic dianhydride, enabling internal carboxylic acid‐driven transesterification. The resulting biodegradable network exhibits mechanical robustness (Young's modulus ≈1.6 GPa), complete recyclability, rapid biodegradation
Lars Schwarzer +2 more
wiley +1 more source
Internal Friction in the Ferroelectric – Ferromagnetic Composites
Archives of Metallurgy and Materials, 2013 W pracy wyznaczano temperaturowe Q-1(T) i amplitudowe Q-1(e) zależności tarcia wewnętrznego dla ferroelektrycz.no - ferromagnetycznych kompozytów powstałych na bazie PZT i ferrytu.
Zachariasz R. +3 more
doaj +1 more source
Control of rotordynamic instability in a typical gas turbine's power system [PDF]
The effect of rotor internal friction on the system's stability was studied when operated above the first critical speed. This internal friction is commonly caused by sliding press fits or sliding splines.
Page, R. H. +2 more
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Drug‐Free Thrombolysis Mediated by Physically Activated Micro/Nanoparticles
Advanced Functional Materials, EarlyView.Overview of particle‐mediated thrombolytic effects (thermal, mechanical, and chemical) and their activating physical stimuli (light, ultrasound, and magnetic field) in drug‐free thrombolysis. ABSTRACT Thrombus‐associated disorders rank among the world's leading causes of death, with ischemic heart disease and stroke as the main contributors.
Pierre Sarfati +2 more
wiley +1 more source
Archives of Metallurgy and Materials, 2015 The phase transformation phenomena in eutectic Ga-In-Sn alloys around room temperature are studied by thermal analysis, internal friction, and in-situ XRD methods.
Jin Mingjiang +5 more
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Advanced Functional Materials, EarlyView.Light reflectance increases along incidence angle and transmittance significantly drops around 90‐degree incidence angle. Here, we report two‐photon laser printed micro mirrors that redirect the skimming light beam into normal light absorption. Using this technique, light‐driven micro walkers and grippers are demonstrated by using grazing incidence ...
Leilei Song, Jianfeng Yang, Hao Zeng
wiley +1 more source
Interparticle Friction in Granular Ceramic Materials
KONA Powder and Particle Journal, 2014 The frictional behaviour of dry ceramic materials in the form of spherical beads, sand and spray dried powders has been studied.
N. W. Page, M. Yousuff, C.J. Wauchope
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Novel Functional Materials via 3D Printing by Vat Photopolymerization
Advanced Functional Materials, EarlyView.This Perspective systematically analyzes strategies for incorporating functionalities into 3D‐printed materials via Vat Photopolymerization (VP). It explores the spectrum of achievable functionalities in recently reported novel materials—such as conductive, energy‐storing, biodegradable, stimuli‐responsive, self‐healing, shape‐memory, biomaterials, and
Sergey S. Nechausov +3 more
wiley +1 more source