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Wyszukujesz frazę "laser simulation" wg kryterium: Temat


Tytuł:
Analysis of Tilted Columnar Dendrites at Grain Boundaries During Wire and Laser Additive Manufacturing: a Phase-Field Study
Autorzy:
Zong, Nanfu
Sun, Weizhao
Liang, Xinghong
Jing, Tao
Powiązania:
https://bibliotekanauki.pl/articles/27313866.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
wire and laser additive manufacturing
tilted columnar dendrites
overgrowth behavior
phase field simulation
grain boundary
Opis:
Tilted columnar dendritic morphologies are usually existed in wire and laser additive manufactured parts of GH3039 alloy. Overgrowth behaviors induced by the tilted dendritic arrays with a large tilted angle, and the effect of the angle between the growth direction and the direction vertical locally to the solid substrate on primary spacing, solute concentration and morphological evolution have been investigated at both the converging and the diverging grain boundaries through the phase-field simulation. The formation of cracking depends on solidification behaviors including columnar dendrites growth and micro-segregation in the interdendritic region. Furthermore, the effect of the tilted columnar dendrites on the susceptibility of crack is investigated during wire and laser additive manufacturing.
Źródło:
Archives of Metallurgy and Materials; 2023, 68, 2; 469--475
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Columnar Dendrite Morphology and Solute Concentration of GH3039 Nickel-Based Superalloys during Wire and Laser Additive Manufacturing: Insights from Phase Field Simulations
Autorzy:
Zong, Nanfu
Wang, Zheng
Liu, Yang
Liang, Xinghong
Jing, Tao
Powiązania:
https://bibliotekanauki.pl/articles/2203717.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
wire and laser additive manufacturing
phase field simulation
solute concentration
interface crystallographic deflection
columnar dendrite
Opis:
Wire and laser additive manufacturing (WLAM) can produce outstanding mechanical properties of GH3039 nickel-based superalloys. A quantitative rapid phase field model with solute trapping kinetics has been developed during the rapid solidification process, where a range of process conditions are considered in terms of thermal gradients and pulling speeds. Intergranular hot cracking is found to occur at boundaries of tilted columnar dendrite in the GH3039 nickel-based superalloys. The simulations demonstrate that the phase field model considering the interface deflection can represent the dendrite growth during additive manufacturing more realistically. With the aid of numerical simulations, it is determined that dendrite growth morphologies transform from symmetrical columnar dendrite to tilted columnar dendrite as the interface crystallographic deflection is increased, while increasing the deflection angle can lead to uneven composition of material matrix, especially at the columnar dendrite interface. Solute concentrations at the columnar dendrite interface tend to promote hot cracking in additively manufactured Ni-based superalloy.
Źródło:
Archives of Metallurgy and Materials; 2023, 68, 1; 387--393
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Point-ahead analysis and pre-pointing link stability study of intersatellite laser communication
Autorzy:
Zhang, Fu-Rui
Han, Jun-Feng
Ruan, Ping
Powiązania:
https://bibliotekanauki.pl/articles/174817.pdf
Data publikacji:
2020
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
intersatellite laser communication
point-ahead
link stability
simulation
Opis:
The static bias error angle obviously affects pre-pointing links’ stability in the presence of vibration in intersatellite laser communication. The 2nd order point-ahead angle is a source of misalignment which was ignored in most solutions, and this is the concern of our paper. In this study, we present a further analytical investigation into the point-ahead angle in complex satellite maneuvering environment. Static bias error angle induced by the 2nd order point-ahead angle has been studied under different intersatellite links. The probability density function of the pre-pointing links’ outage has been derived in the presence of pointing jitter taking consideration of the static bias angle, and the link budget has also been analyzed. Simulation model of link stability has been established to verify the numerical results by the Monte Carlo method in Matlab-Simulink environment. The results have shown that the 2nd order point-ahead angle has a significant detrimental impact on link stability in long distance links. It is a neglectable factor. This work is dedicated to intersatellite laser communication system design.
Źródło:
Optica Applicata; 2020, 50, 1; 111-126
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Microscale laser shock imprinting of micro-molds with different sizes and shapes
Autorzy:
Yang, H.
Liu, K.
Liu, H.
Powiązania:
https://bibliotekanauki.pl/articles/174650.pdf
Data publikacji:
2018
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
laser shock
imprinting
micro-mold
deformation depth
numerical simulation
Opis:
There are higher requirements for microstructures and high-precision components in microelectronics, photonics, sensors, optoelectronics and medical devices. For changing the traditional manufacturing methods with cumbersome process and complex equipment, researchers put forward a laser shock forming technique which can contribute to the metal forming with high precision and efficiency in recent years. So far, the laser shock forming needed high pulse energy and high energy. In this paper, nanosecond laser with high frequency and low pulse energy was adopted to make possible the aluminum foil forming on the copper micro-molds with different sizes and shapes. The deformations of aluminum foil were measured by SEM, optical profiler and AFM. Also, the deformation laws were analyzed by comparing imprinting results under different micro-molds. Lastly, stress distribution and deformation process of aluminum foil was investigated by numerical simulations.
Źródło:
Optica Applicata; 2018, 48, 4; 671-686
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fabrication of polymer microcomponents using CO2 laser melting technique
Wytwarzanie mikroelementów polimerowych z zastosowaniem techniki topienia laserem CO2
Autorzy:
Tan, W. S.
Zhou, J. Z.
Huang, S.
Zhu, W. L.
Meng, X. K.
Powiązania:
https://bibliotekanauki.pl/articles/947347.pdf
Data publikacji:
2015
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Chemii Przemysłowej
Tematy:
molding
polymer microcomponents
CO2 laser
irradiation
numerical simulation
formowanie
mikroelementy polimerowe
laser CO2
napromienianie
symulacja numeryczna
Opis:
A new method of laser melting molding to produce high-efficiency and high-quality polymer microcomponents was proposed. Numerical simulation was used to analyze the temperature changes of polymer melt during the laser irradiation process. An orthogonal experiment was also employed to investigate the factors influencing molding accuracy. The molding experiments were conducted on molds with various degrees of roughness, and the surface quality of the molded pieces was tested. The simulation analysis and experimental results showed that the laser power plays a critical role in improving the repetition accuracy. The next factors are irradiation time and mold temperature, followed by molding force. Optimized technological parameters (1.2 W of laser power, 6 mm of laser beam width, 6 s irradiation time, 150 N molding force, and 80 °C mold temperature) were applied to obtain a molded pieces with high repetition accuracy and a microstructure dimensional deviation of less than 1 µm. Using a mold with lower surface roughness provides that we can obtain a molded piece with lower roughness, the roughness difference between the mold and the molded piece was less than 0.012 µm.
Zaproponowano nową metodę formowania mikroelementów polimerowych z zastosowaniem topienia laserowego, zapewniającą wysoką wydajność oraz dobrą jakość wytwarzanych mikroelementów. Istotnym parametrem procesu, wpływającym na jakość formowanych elementów, jest temperatura stopu polimeru. Do analizy zmian tej temperatury pod wpływem napromieniania laserem zastosowano symulację numeryczną. Zastosowano także ortogonalny plan eksperymentu w celu zbadania czynników wpływających na dokładność formowania. Formowania przeprowadzono z użyciem form o różnych stopniach chropowatości i zbadano jakość powierzchni mikroelementów. Analiza wyników symulacji i badań eksperymentalnych wykazała, że moc lasera odgrywa kluczową rolę w uzyskaniu powtarzalnej dokładności. Kolejnymi czynnikami są czas napromieniowania i temperatura formy oraz siły formujące. Zoptymalizowane parametry technologiczne (moc lasera 1,2 W, szerokość wiązki lasera 6mm, czas napromieniania 6 s, siła formująca 150 N i temperatura formowania 80 °C) zastosowano do formowania elementów z powtarzalną dużą dokładnością odtwarzania wymiarów (odchylenia wymiarów nie przekraczały 1 µm). Użycie form o mniejszej chropowatości powierzchni pozwalało także uzyskać mniejszą chropowatość mikroelementów, przy czym różnica chropowatości formy i otrzymanego elementu była mniejsza niż 0,012 µm.
Źródło:
Polimery; 2015, 60, 3; 192-198
0032-2725
Pojawia się w:
Polimery
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of Pumping Beam Width on VECSEL Output Power
Autorzy:
Sokół, A. K.
Sarzała, R. P.
Powiązania:
https://bibliotekanauki.pl/articles/226018.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
VECSEL
SDL
semiconductor disk laser
simulation
numerical modeling
power scaling
Opis:
The paper is devoted to a numerical analysis of an influence of a pumping beam diameter on output power of optically pumped vertical-external-cavity surface-emitting lasers. Simulations have been carried out for a structure with a GaInNAs/GaAs active region operating at 1.32 μm. Various assembly configurations have been considered. Results obtained show that laser power scaling is strongly affected by thermal properties of the device.
Źródło:
International Journal of Electronics and Telecommunications; 2014, 60, 3; 239-245
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical model of a semiconductor disk laser
Autorzy:
Sokół, A. K.
Sarzała, R. P.
Powiązania:
https://bibliotekanauki.pl/articles/174528.pdf
Data publikacji:
2016
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
semiconductor disk laser
SDL
vertical-external-cavity surface-emitting laser
VECSEL
computer simulation
numerical modelling
Opis:
In this paper we describe the numerical model of a semiconductor disk laser, developed and implemented in the Photonics Group, Institute of Physics, Lodz University of Technology, Poland. It consists of four strongly interrelated components for: carrier transport, heat flow, material gain and optical phenomena calculations. Combination of these components gives the steady-state self-consistent model which enables a simulation of various aspects of a semiconductor disk laser operation. A numerical analysis of carrier and power losses within the active region of 1.3-μm GaInNAs/GaAs semiconductor disk laser has been carried out using this model.
Źródło:
Optica Applicata; 2016, 46, 2; 199-211
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Laser melted steel free surface formation
Tworzenie powierzchni swobodnej laserowo przetapianej stali
Autorzy:
Siwek, A.
Powiązania:
https://bibliotekanauki.pl/articles/264124.pdf
Data publikacji:
2007
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
obróbka laserowa
modelowanie
analiza numeryczna
efekt Marangoniego
konwekcja, geometria strefy przetopionej
laser treatment
simulation
numerical analysis
Marangoni effect
convection
geometry of the melted zone
Opis:
Two-dimensional mathematical model of recasting steel by laser was presented in this paper. Surface velocity and liquid temperature for several powers of laser beams and sulfur contents were obtained as results of numerical modeling of liquid flow and heat exchange processes. The shape of free surface in a melted zone was computed with the use of iterative method proposed in this paper.
W pracy zaprezentowano dwuwymiarowy model matematyczny laserowego przetapiania stali. Jako wynik numerycznego modelowania procesów przepływu cieczy i wymiany ciepła, otrzymano pole prędkości i temperatury cieczy dla kilku mocy wiązki laserowej oraz zawartości siarki. Korzystając z zaproponowanej w pracy metody iteracyjnej, obliczono kształt powierzchni swobodnej w strefie przetopionej.
Źródło:
Metallurgy and Foundry Engineering; 2007, 33, 1; 13-21
1230-2325
2300-8377
Pojawia się w:
Metallurgy and Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
GaInNAs quantum-well vertical-cavity surface-emitting lasers emitting at 2.33 μm
Autorzy:
Piskorski, Ł.
Sarzała, R. P.
Powiązania:
https://bibliotekanauki.pl/articles/199958.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
simulation of a diode-laser operation
QW VCSELs
mid-infrared radiation
dilute nitrides
Opis:
In the present paper, the comprehensive fully self-consistent optical-electrical-thermal-recombination model is used to determine the optimal structure of the possible GaInNAs quantum-well (QW) tunnel-junction (TJ) vertical-cavity surface-emitting lasers (VCSELs) with single-fundamental-mode operation at 2.33 μm wavelength suited for carbon monoxide sensing applications. From among various considered structures, the diode laser with 4-μm TJ and two 6-nm Ga0.15In0.85N0.015As0.985/Ga0.327In0.673As0.71P0.29 QWs has the lowest threshold current and seems to be optimal for the above applications. Higher threshold currents are obtained for Ga0.15In0.85N0.015As0.985/Al0.138 -Ga0.332In0.530As QW structures but the latter can be grown in reactors without P source which are used for fabrication of GaAs-based devices. Both the modelled VCSELs offer a very promising room temperature continuous wave performance and may represent an alternative choice to GaSb-based lasers.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2013, 61, 3; 737-744
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Laserowe stanowisko symulacyjne mili pomiarowej
Measured mile laser simulation post
Autorzy:
Panasiuk, A.
Powiązania:
https://bibliotekanauki.pl/articles/315908.pdf
Data publikacji:
2013
Wydawca:
Instytut Naukowo-Wydawniczy "SPATIUM"
Tematy:
mila pomiarowa
laserowe stanowisko symulacyjne
model redukcyjny
measured mile
laser simulation
scale model
Opis:
Artykuł zawiera przedstawienie laserowego stanowiska pomiarowego imitującego Milę Pomiarową w warunkach laboratoryjnych. Poruszono podstawy teoretyczne pomiarów prędkości okrętu i ich odniesienie do modelu. Przedstawione zostały także wyniki pomiarów prędkości modelu redukcyjnego na basenie pomiarowym dla wybranych warunków.
Paper presents the measured mile full imitation post in laboratory conditions. Theoretical base of ship speed measurement in relate to model was also included. Author presents some model speed measurement results on maneuvering pool for selected conditions.
Źródło:
Autobusy : technika, eksploatacja, systemy transportowe; 2013, 14, 3; 1873-1883
1509-5878
2450-7725
Pojawia się w:
Autobusy : technika, eksploatacja, systemy transportowe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Strategies of Heating and Hardening External Corners on the Example of Bending Tools for Press Brakes
Autorzy:
Nowotyńska, Irena
Kut, Stanisław
Powiązania:
https://bibliotekanauki.pl/articles/2204047.pdf
Data publikacji:
2022
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
bending tool
laser hardening
temperature distributions
FEM simulation
finite element method simulation
Opis:
In the paper the methods of laser hardening of external tool corners on the example of bending tools for press brakes were presented. The disadvantages and limitations of the most commonly used techniques for guiding a hardening laser light beam are presented, i.e.: (i) in one pass parallel to the tool corner plane symmetry, (ii) in two passes perpendicular to the surfaces adjacent to the corner, and (iii) in one pass perpendicular to the surface adjacent to the corner by using two diode lasers. The microstructure of the tool material after laser and induction hardening was compared. A significant influence of the heating method on the microstructure of the tool material after hardening was demonstrated. The original method of hardening the outer corners of bending tools using a hardening laser beam splitter was subject to a more detailed analysis. The analysis of material heating in simultaneously hardened corner area and adjacent surfaces was carried out using the Marc/Mentat software based on the finite element method. By analyzing the temperature distributions it was shown that if a beam splitter was used, obtaining a continuous and uniform hardened layer (i.e. with comparable hardness, depth, without tempered or non-tempered areas) in the area of the outer corner and adjacent surfaces was possible. In practice, achieving such a layer is conditioned by the correct selection of the size of the k parameter which determines the distance between the separated beams of laser light. Depending on the geometry of the hardened tool corner and the parameters of the hardening laser beam, this distance can be determined experimentally or on the basis of numerical simulation.
Źródło:
Advances in Science and Technology. Research Journal; 2022, 16, 5; 250--260
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Symulacja numeryczna laserowego umacniania udarowego stopu tytanu Ti-6Al-2Cr-2Mo
The numerical simulation of laser shot peening of Ti-6Al-2Cr-2Mo titanium alloy
Autorzy:
Napadłek, W.
Kosiuczenko, K.
Powiązania:
https://bibliotekanauki.pl/articles/159612.pdf
Data publikacji:
2008
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Elektrotechniki
Tematy:
stop tytanu Ti-6Al-2Cr-2Mo
laserowe umacnianie udarowe
topografia powierzchni
mikrostruktura
symulacja numeryczna MES
titanium alloy
Ti-6Al-2Cr-2Mo
laser shot peening
surface topography
microstructure
numerical simulation
Opis:
W artykule przedstawiono wybrane wyniki eksperymentów laboratoryjnych wykonanych na stopie tytanu Ti-6Al-2Cr-2Mo. Opisano model fizyczny, opracowano model numeryczny, wykonano opis matematyczny zjawisk fizycznych zachodzących przy umacnianiu laserowym LSP (metoda MRS). Wykonano siatki modeli MES stanu odkształceń i naprężeń własnych dla badanego materiału w wybranych wariantach technologicznych. Przeprowadzone symulacje numeryczne potwierdziły poprawność przyjętych założeń i modeli. Stan wytężenia materiału po wielokrotnym obciążeniu udarowym (LSP) nie zmienia się proporcjonalnie do ilości impulsów laserowych - ma charakter nieliniowy.
The selected results of laboratory experiments made on the Ti-6Al-2Cr-2Mo titanium alloy were presented in the paper. It was described the physical model, was elaborated of numerical model, was made mathematical description of physical phenomena, which occur at laser shot peening (LSP). It were made networks of FEM models of strain state and internal stresses for tested material in the selected technological variants. Conducted numerical simulations were confirmed correctness of established assumption and models. The effort state of material after multiple shot peening (LPS) does not change in proportion to amount of laser impulses - it has nonlinear character.
Źródło:
Prace Instytutu Elektrotechniki; 2008, 237; 31-44
0032-6216
Pojawia się w:
Prace Instytutu Elektrotechniki
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Thermal Operating Window in Selective Laser Melting Processes
Autorzy:
Kozak, Jerzy
Zakrzewski, Tomasz
Witt, Marta
Dębowska-Wąsak, Martyna
Powiązania:
https://bibliotekanauki.pl/articles/36833418.pdf
Data publikacji:
2023
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Lotnictwa
Tematy:
selective laser melting
SLM
thermal limitation
mathematical modeling
simulation
Opis:
Selective laser melting (SLM) is one of the most effective methods of additive manufacturing (AM). It is used to manufacture products with very complex geometries using a wide range of materials. Practical process conditions are limited by the occurrence of undesirable melting instabilities that degrade the surface quality and lead to product defects. These disadvantages are related to the thermal limitations of the SLM process. The lower thermal limit is due to the need to completely melt the powder layer and partially remelt the underlying layer again to ensure proper bonding between the layers. Exceeding the upper thermal limit in the molten metal pool may cause extensive evaporation, boiling and ejection of molten metal droplets outside the melting area. The article presents an approach and methodology that enable the determination of thermal limits and the operating window of SLM/selective laser sintering (SLS) processes in a relatively simple way. The studies have been performed using various settings of SLM process parameters. The usefulness of the preliminary determination of thermal limitations and approximate prediction of operating window of SLM has been confirmed experimentally and by more accurate computer simulation.
Źródło:
Transactions on Aerospace Research; 2023, 4 (273); 18-32
0509-6669
2545-2835
Pojawia się w:
Transactions on Aerospace Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The evaluation of the efficiency of active control system for aerial bomb
Autorzy:
Kowaleczko, G.
Żyluk, A.
Pietraszek, M.
Wijaszka, M.
Powiązania:
https://bibliotekanauki.pl/articles/244285.pdf
Data publikacji:
2018
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
simulation
PID controller
laser-guided bombs
Opis:
The article presents the results of numerical simulation of a laser-guided bomb, which is dropped in calm weather conditions. The prototype of such a bomb was developed at the Air Force Institute of Technology. It was a result of the modification process of the classical training bomb. The modification consisted of building on the bomb's board a detection system to track targets that are designated by laser and a control system to adjust bomb’s glide path to precisely strike the target. In the simulation research, geometric and mass characteristics of the classical training bomb were used. Aerodynamic characteristics of the bomb have been determined using commercial software PRODAS. Using the mathematical model of the bomb spatial motion and model of the laser detection system series of simulations were performed. The main goal was to determine the effectiveness of the adopted construction solution. Therefore, simulations were performed for various initial positions of the bomb and fixed position of the target. It allowed finding the set of control laws coefficients giving the most accuracy of the bomb. The influence of structural modifications of the detection system on the possibility of effective detection and location of the target was also investigated. In the article, exemplary results of numerical calculations performed with the author's software are also shown.
Źródło:
Journal of KONES; 2018, 25, 4; 165-174
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical simulation the finite element method (FEM) of stress and strain for the chosen coatings TBCs on turbine blades loaded with laser impulses
Autorzy:
Kosiuczenko, K.
Napadłek, W.
Powiązania:
https://bibliotekanauki.pl/articles/248121.pdf
Data publikacji:
2012
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
superalloy ŻS6K-WI
laser ablation
numerical simulation MES
Opis:
This paper presents the results of laser ablation the barrier coating TBCs (Al2O3, ZrO2) generated on aircraft engine turbine blade made for nickel base alloy ŻS6K-- WI. Authors used neodymium impulse Nd: YAG laser, radiation with a wavelength of 1064 nm. In parallel with the laboratory experiment was performed numerical simulation of laser ablation. FEM simulation results were used for to choose the relevant laser parameters (impulse duration, impulse shape and course in time, power density) and to identify the temperature distribution heat fluxes and the state of stress and strain in the critical zones of the barrier coating TBCs. The simulation was carried out using the finite element method program LS-Dyna. On the basis of numerical simulation shown the influence of the impact layer TBCs as a thermal insulation and shown place the appearance of destructive deformation. Defined distributed tension as a function of time and estimated time destruction parts the barrier layer during the laser ablation micromachining. Model 3D of the engine turbine blades DV - 2, Analyzed piece of blade, physical model, temperature maps, maps of the reduced stress are presented in the paper
Źródło:
Journal of KONES; 2012, 19, 1; 183-186
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł

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