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Wyszukujesz frazę "Sankaranarayanan, R." wg kryterium: Autor


Wyświetlanie 1-4 z 4
Tytuł:
Investigation on surface roughness and kerf analysis in abrasive water jet machining of silicon carbide
Autorzy:
Hynes, N.R.J.
Asirvatham, A.D.
Sankaranarayanan, R.
Raja, S.
Benita, B.
Atchaya, J.
Tematy:
ceramic
cutting
abrasive water jet machining
ceramika
cięcie
cięcie strumieniem wodno-ściernym
Pokaż więcej
Wydawca:
Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
Powiązania:
https://bibliotekanauki.pl/articles/24200627.pdf  Link otwiera się w nowym oknie
Opis:
Purpose: Machining silicon carbide (SiC) is challenging due to its brittle and maximum tensile nature. Lapping or laser beam are done with a high cost of manufacturing and low material removal rates. Water abrasive jet cutting is a promising candidate since the machining temperatures and processing force of ceramics are extremely low. Investigation into the abrasive water jet machining of silicon carbide is carried out in the present work. Design/methodology/approach: The variations in traverse speed while abrasive water jet cutting of silicon carbide and its effect on the surface roughness and kerf characteristics are studied. Silicon Carbide abrasive material is used as garnet consisting of 80 mesh. The surface roughness was calculated along with the depth of the cut made during the processing. Findings: The outcomes demonstrated that the traverse speed is more effective upon the surface roughness and is an important factor that damages the top kerf width and the kerf taper angle. Research limitations/implications: Based on the hardness and thickness of the SiC plate, the taper angle is high, and for a feed rate of 10 mm/min, the surface roughness is low. Less thickness of the SiC plate could have a lower taper angle than with high thickness. The erosive force is provided by abrasive material along with the jet stream. Practical implications: Water abrasive fine jet could effectively machinate silicon carbide ceramic material with a better surface finish accurately. Suitable surface roughness with higher productivity can be attained with medium traverse speed. Originality/value: The effect of process parameters on kerf taper angle and top kerf width in the abrasive water jet machining of silicon carbide is explored, considering surface roughness as an important output parameter.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Estimation of enamel removal rate in micro-abrasion based drill-less dentistry
Autorzy:
Sujana, J. A. J.
Sujana, N. J.
Hynes, N. R. J.
Jebaraj, D. J. J.
Sankaranarayanan, R.
Kumar, J. S.
Tematy:
enamel removal rate
dentistry
air-abrasion
modelling
szybkość usuwania szkliwa
stomatologia
ścieranie powietrzne
modelowanie
Pokaż więcej
Wydawca:
Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
Powiązania:
https://bibliotekanauki.pl/articles/59116168.pdf  Link otwiera się w nowym oknie
Opis:
Purpose: Drill less dentistry is painless, riskless, soundless and heatless and is very suitable for dental-related concerns where children are the most affected fraternity. Removing enamel from the teeth at the affected region by conventional drilling mechanism is challenging. The processed region is filled using amalgam or other sources for the occupation. The proceedings are a painful experience for the patients due to heat generation while drilling, which also induces vibrations and related noises. There are higher possibilities for tissue damage and disturbances in the unaffected regions. Air-abrasion-based drill-less dentistry handles such problems in a novel way and provides a comparatively pleasant treatment experience to patients. Design/methodology/approach: The enamel removal rate influences the drill-less dentistry as it empowers to predict the quantum of material that can be abraded while executing the process. The mathematical expression of the enamel removal rate has been estimated based on the basic laws of physics and assumptions. Findings: The current work exhibits mathematical modelling to predict the enamel removal. The expression also reveals that the velocity, density and mass flow rate of abrasive particles has a crucial role in deciding the rate of enamel removal from the tooth. The present mathematical expression provides beneficial inputs to the research fraternity in the dental field. Research limitations/implications: The current mathematical expression has arrived through basic laws of physics and assumptions. The enamel removal rate is estimated using an analytical model, and the current mathematical expression can be improvised through fine-tuning fine. The present preliminary studies could be helpful in developing an accurate predictive model in future. Practical implications: The present research supports drill-less dentistry and provides a mathematical solution in terms of derived formulations in predicting the enamel removal rate, as enamel removal rate plays an essential role in drill-less dentistry. Originality/value: The mathematical expression facilitates the problem handling more practically and efficiently. The mathematical expression is helpful in studying and deciding the processing conditions such as stream velocity, particle density and mass flow rate on effective enamel removal rate from the tooth structure.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Jednokanałowy system obsługi masowej z erlangowskim procesem wejścia i semimarkowskimi czasami obsługi
Applicationes Mathematicae T.17 (1980-1983)
The single server queue with Erlang input and semi-Markov service times
Zastosowania Matematyki T.17 (1980-1983)
Autorzy:
Sankaranarayanan, G.
Ramanarayanan, R.
Usha, K.
Współwytwórcy:
Polska Akademia Nauk. Instytut Matematyczny.
Wydawca:
Państwowe Wydawnictwo Naukowe
Opis:
Abstract in Polish
Streszczenie w jęz. polskim
Od t.8 (1965) tyt. równol. : Applicationes Mathematicae
25 cm
Dostawca treści:
RCIN - Repozytorium Cyfrowe Instytutów Naukowych
Książka
    Wyświetlanie 1-4 z 4

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