Computational engineering of surface layer ground Al2O3‒TiC ceramic. Combined analysis

2020 ◽  
pp. 67-72
Author(s):  
V. V. Kuzin ◽  
S. N. Grigor’ev ◽  
M. A. Volosova
Keyword(s):  
Surface Layer ◽  
Stress State ◽  
Structural Elements ◽  
Force Load ◽  
Elastic Deformations ◽  
Computational Engineering ◽  
Combined Analysis ◽  
Stress Concentrators ◽  
Combined Load

The main regularities of the stress state of the surface layer of ground Al2O3‒TiC ceramic under the combined load are determined. It is revealed that the force load compensates for thermal elastic deformations, but at the same time complicates the stress state in comparison with the action of loads of the same type. The role of the combination of structural elements that formed the surface of Al2O3‒TiC ceramic in the formation of unfavorable microstructural stress concentrators is established.

Computational engineering of surface layer ground Al2O3‒TiC ceramic. Thermal analysis

2020 ◽  
pp. 53-58
Author(s):  
V. V. Kuzin ◽  
S. N. Grigoriev ◽  
M. A. Volosova
Keyword(s):  
Thermal Analysis ◽  
Surface Layer ◽  
Stress State ◽  
Heat Flow ◽  
Fracture Mechanism ◽  
Computational Engineering ◽  
Stress Concentrators ◽  
Thermal Factor

The regularities of the thermal and stress state of the surface layer of ground Al2O3‒TiC ceramic under influence of heat flow are established. It is revealed that the role of the thermal factor in the fracture mechanism of this layer is manifested in the formation of unfavorable microstructural stress concentrators.

Thermal analysis of stress-strain state of Al2O3‒SiС ceramics surface layer with AlN and TiN coatings

2021 ◽  
Vol 1 (7) ◽  
pp. 57-62
Author(s):  
V. V. Kuzin ◽  
M. A. Volosova ◽  
M. Yu. Fedorov
Keyword(s):  
Thermal Analysis ◽  
Surface Layer ◽  
Heat Flow ◽  
Strain State ◽  
Structural Elements ◽  
Stress Strain ◽  
Stress Concentrators ◽  
Stress Strain State ◽  
Tin Coatings

The regularities of influence of AlN and TiN coatings on stress-strain state of Al2O3‒TiC ceramics structural elements, which forming its surface layer, under influence of heat flow are established. The formation of microstructural stress concentrators at the boundary of AlN and TiN coatings with the initial ceramics is revealed.

Force analysis of the stress-strain state of the surface layer of Al 2O3‒TiCceramics with AlN and TiN coatings

2021 ◽  
pp. 64-69
Author(s):  
V. V. Kuzin ◽  
M. A. Volosova ◽  
M. Yu. Fedorov
Keyword(s):  
Surface Layer ◽  
Stress Intensity ◽  
Strain State ◽  
Computer Engineering ◽  
Structural Elements ◽  
Force Analysis ◽  
Force Load ◽  
Stress Strain ◽  
Stress Strain State ◽  
Tin Coatings

Regularities of stress-strain state of surface layer of Al2O3‒TiC-ceramics with AlN and TiN coatings under the action of force load are established using the methodology of computer engineering. The features of influence of AlN and TiN coatings on the nature of changes in the stress intensity in the surfaces of structural elements forming the surface layer of Al2O3‒TiC ceramics are determined. The formation of microstructural stress concentrators at the boundary of the AlN and TiN coatings with the initial ceramics is revealed.

Prediction and assessment of effective state of machinery surface layer at science intensive technologies use

2018 ◽  
Vol 2018 (8) ◽  
pp. 44-48
Author(s):  
В. Бутенко ◽  
V. Butenko
Keyword(s):  
Surface Layer ◽  
Quality Index ◽  
Working Capacity ◽  
Material Quality ◽  
Layer Material ◽  
Operation Characteristics

The assessment indices of surface layer effective state in machinery subjected to different ways of finishing are considered. The role of the dislocation restructurization process in the formation of operation characteristics of surface layer material quality and prediction of its working capacity is shown. A generalized quality index of multi-component functional layers formed on operation surfaces of machinery is described.

“Eternal Bodies”: images of archangels in the upper parts of Nubian buildings

2020 ◽  
pp. 713-736
Author(s):  
Magdalena Łaptaś
Keyword(s):  
Near East ◽  
Structural Elements ◽  
Christian Art ◽  
The Earth ◽  
Cosmic Space

Images of archangels and angels, which were painted on the walls, in the upper parts of the buildings and, on their structural elements, were very popular in Christian Nubian painting as attested by the discoveries from Church SWN.BV on the citadel in Old Dongola. These images, which derive from pre-Christian art, depict the eternal nature of the archangels and angels. Presenting this group of representations, the author traces the origins of these images to highlight the role of these spiritual beings as intermediaries between God and humankind. As such, they move freely between the Heavens and the Earth, so the air and cosmic space are their natural surroundings. Moreover, archangels govern the forces of nature, the planets, and the seven skies. Therefore, their sanctuaries were located on hill summits, in the upper chapels, on structural elements of ecclesiastical buildings, etc. The Nubian tradition is therefore part of a broader Mediterranean tradition, the roots of which should be sought in the Near East.

Role of suspended matter in controlling beryllium-7 (7Be) in the Black Sea surface layer

2021 ◽  
pp. 103513
Author(s):  
Dmitrii A. Kremenchutskii ◽  
Gennady F. Batrakov ◽  
Illarion I. Dovhyi ◽  
Yury A. Sapozhnikov
Keyword(s):  
Surface Layer ◽  
Black Sea ◽  
Suspended Matter ◽  
Sea Surface ◽  
The Black Sea

scholarly journals Structural elements in the flexible tail of the co-chaperone p23 coordinate client binding and progression of the Hsp90 chaperone cycle

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Maximilian M. Biebl ◽  
Abraham Lopez ◽  
Alexandra Rehn ◽  
Lee Freiburger ◽  
Jannis Lawatscheck ◽  
...  
Keyword(s):  
Proximal Region ◽  
Tryptophan Residue ◽  
Structural Elements ◽  
Physiological Importance ◽  
In Vivo Experiments ◽  
Cellular Context ◽  
Catalytic Loop ◽  
Hsp90 Chaperone

AbstractThe co-chaperone p23 is a central part of the Hsp90 machinery. It stabilizes the closed conformation of Hsp90, inhibits its ATPase and is important for client maturation. Yet, how this is achieved has remained enigmatic. Here, we show that a tryptophan residue in the proximal region of the tail decelerates the ATPase by allosterically switching the conformation of the catalytic loop in Hsp90. We further show by NMR spectroscopy that the tail interacts with the Hsp90 client binding site via a conserved helix. This helical motif in the p23 tail also binds to the client protein glucocorticoid receptor (GR) in the free and Hsp90-bound form. In vivo experiments confirm the physiological importance of ATPase modulation and the role of the evolutionary conserved helical motif for GR activation in the cellular context.

scholarly journals Demand and Defective Growth Patterns: The Role of The Tradable and Non-Tradable Sectors in an Open Economy

2014 ◽  
Vol 104 (5) ◽  
pp. 272-277 ◽  
Author(s):  
Sandile Hlatshwayo ◽  
Michael Spence
Keyword(s):  
Open Economy ◽  
Aggregate Demand ◽  
Value Added ◽  
Growth Patterns ◽  
Structural Elements ◽  
Total Income ◽  
Us Economy ◽  
The Us ◽  
Tradable Sector

This paper examines the underlying structural elements of US growth patterns, pre- and post-crisis. Prior to the recession, the US economy exhibited a defective growth pattern driven by outsized domestic demand. As domestic aggregate demand retreats to more sustainable levels relative to total income, the tradable side of the economy is a catalyst for restoring strong growth. A structural rebalancing is already underway; although it is only a third of the economy, the tradable sector generated more than half of gross gains in value-added since the start of the recovery. However, distributional issues loom on the horizon.

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