Results 41 to 50 of about 71,674 (211)

Crack Growth in Hydrous Soda-Lime Silicate Glass

open access: yesFrontiers in Materials, 2020
Stable crack growth was measured for nominal dry and water-bearing (6 wt%) soda-lime silicate glasses in double cantilever beam geometry and combined with DMA studies on the effects of dissolved water on internal friction and glass transition ...
Tina Waurischk   +6 more
doaj   +1 more source

In-cylinder fuel and lubricant effects on gasoline engine friction [PDF]

open access: yes, 2007
The purpose of the research reported in this thesis was to investigate the viability and quantify the potential gains of improving fuel economy of the gasoline engine through strategic application of additives.
Smith, Oiver Mark Edward   +1 more
core  

THE CHOICE OF RELAXATION IN DESCRIBING MECHANICAL CHARACTERISTICS OF HIGH TEMPERATURE AREA OF DISSIPATIVE LOSS IN THE SPECTRUM OF INTERNAL FRICTION

open access: yesТонкие химические технологии, 2017
The analysis of experimental internal friction spectrum tgδ - f(T) shows that monocrystalline metallic materials possess the simplest spectrum. For those materials, dissipation of a part of the energy of external power impact exists in a form of internal
A. A. Valishin   +3 more
doaj   +1 more source

Influence of annealing on indicatory surface of anelastic-elastic body of GeSi

open access: yesDiscover Applied Sciences
The temperature-dependent behavior of internal friction Q − 1 and elastic modulus Е of Ge0.95Si0.05 was investigated and represented through the plotting of 3D “indicatory surface of anelastic-elastic body”.
Yurii Onanko   +4 more
doaj   +1 more source

Relaxation and physicomechanical characteristics of polyethylenes with different molecular weights

open access: yesТонкие химические технологии, 2019
Objectives. Determination of the influence of molecular weight on the modulus of elasticity, yield, strength, and retardation processes in polyethylene.Methods.
R. A. Alekhina   +3 more
doaj   +1 more source

Mutual influence of cross hatch angle and superficial roughness of honed surfaces on friction in ring-pack tribo-system [PDF]

open access: yes, 2013
The cylinder bore surface texture, widely produced by the honing technique, is an essential factor for a good engine performance (friction, oil consumption, running-in, wear etc.).
EL MANSORI, Mohamed   +3 more
core   +1 more source

Thermal and Mechanical Fatigue in a Qe22 Magnesium Alloy Reinforced with Short Saffil Fibres

open access: yesCommunications, 2006
Using non-destructive methods changes in the microstructure of QE22 metal matrix composites (MMC) due to thermal and mechanical cycling have been investigated.
Zuzanka Trojanova, Pavel Lukac
doaj   +1 more source

Characterisation of Acoustic Emissions for the Frictional Effect in Engines using Wavelets based Multi-resolution Analysis [PDF]

open access: yes, 2015
The friction between piston ring-cylinder liner is a major cause of energy losses in internal combustion engines. However, no experimental method is available to measure and analyze the fictional behavior. This paper focuses on the investigation of using
Gu, Fengshou   +14 more
core   +1 more source

HYSTERETIC INTERNAL FRICTION

open access: yesLe Journal de Physique Colloques, 1985
It is emphasized that a distribution function in both the dislocation loop lengths and obstacle strengths must be considered to develop a quantitative theory for the hysteretic dissipation of energy. That is when dislocation surmounts and undulating internal stress field and the break-away is restricted by a restoring force considered to be that of ...
Roberts, J., Barnett, D.
openaire   +1 more source

Nanometer scale friction and wear on self-assembled monolayers investigated by atomic force microscopy [PDF]

open access: yes, 2001
Nanometer scale tribology investigates the phenomena of adhesion, friction and wear at the molecular level. It is driven by a basic research interest to unveil the fundamental nature of the processes responsible for energy dissipation in friction and the
Kopta, Susanne
core   +1 more source

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