Results 41 to 50 of about 430,766 (349)

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

Friction of a slider on a granular layer: Non-monotonic thickness dependence and effect of boundary conditions

open access: yes, 2005
We investigate the effective friction encountered by a mass sliding on a granular layer as a function of bed thickness and boundary roughness conditions. The observed friction has minima for a small number of layers before it increases and saturates to a
Arshad Kudrolli   +3 more
core   +1 more source

Performance of discrete heat engines and heat pumps in finite time [PDF]

open access: yes, 2000
The performance in finite time of a discrete heat engine with internal friction is analyzed. The working fluid of the engine is composed of an ensemble of noninteracting two level systems.
A. Bejan   +35 more
core   +3 more sources

Differential Item Functioning on the Patient Health Questionnaire 8 by Disease Subtype, Language, Sex, and Age Among People With Systemic Sclerosis: A Scleroderma Patient‐Centered Intervention Network Cohort Study

open access: yesArthritis Care &Research, EarlyView.
Objective Somatic items used in depression assessments can potentially overlap with symptoms related to physical illness, including systemic sclerosis (SSc). No studies have looked at whether somatic depression items may be influenced by diffuse versus limited SSc disease subtypes, which are associated with varying degrees of symptom presentation.
Sophie Hu   +110 more
wiley   +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

Transitory Ultrasonic Absorption in “Domain Engineered” Structures of 10 M Ni-Mn-Ga Martensite

open access: yesMetals, 2021
In this work we create in 10 M Ni-Mn-Ga martensitic samples special martensitic variant structures consisting of only three twins separated by two a/c twin boundaries: Type I and Type II, with relatively low and very high mobility, respectively.
Sergey Kustov   +5 more
doaj   +1 more source

On the Normal Force and Static Friction Acting on a Rolling Ball Actuated by Internal Point Masses

open access: yes, 2019
The goal of this paper is to investigate the normal and tangential forces acting at the point of contact between a horizontal surface and a rolling ball actuated by internal point masses moving in the ball's frame of reference.
Putkaradze, Vakhtang, Rogers, Stuart
core   +1 more source

Orbits and reversals of a drop rolling inside a horizontal circular hydraulic jump [PDF]

open access: yes, 2013
We explore the complex dynamics of a non-coalescing drop of moderate size inside a circular hydraulic jump of the same liquid formed on a horizontal disk.
Duchesne, Alexis   +4 more
core   +3 more sources

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

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

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