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    Wyświetlanie 1-9 z 9
    Tytuł:
    Experimental-Numerical Model of the Initiation and Propagation of Cracks in Die Inserts
    Autorzy:
    Piekło, J.
    Maj, M.
    Pysz, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/382441.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    experimental model
    numerical model
    die insert
    model doświadczalny
    model numeryczny
    wkładka matrycowa
    Opis:
    The aim of the research presented in this paper was to develop an experimental - numerical model for predicting the life of die inserts. For this purpose, using FEM, the temperature and stress fields in the insert during stable operating cycle of a die casting machine were determined. The study of WCL steel, of which inserts are made, included fatigue tests and tests from the range of fracture mechanics. From the results obtained, a relationship was derived between the number of the die casting machine operating cycles and the propagation speed of cracks formed on the insert working surface.
    Źródło:
    Archives of Foundry Engineering; 2013, 13, 1 spec.; 107-110
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Shaping the Strength of Cast Rocker Arm for Special Purpose Vehicle
    Autorzy:
    Żuczek, R.
    Pysz, S.
    Maj, M.
    Piekło, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/379543.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    computer aiding
    foundry production
    design optimization
    aluminium alloy
    wspomaganie komputerowe
    produkcja odlewnicza
    optymalizacja konstrukcji
    stop aluminium
    Opis:
    The article discusses the weldment to casting conversion process of rocker arm designed for operation in a special purpose vehicle to obtain a consistency of objective functions, which assume the reduced weight of component, the reduced maximum effort of material under the impact of service loads achieved through topology modification for optimum strength distribution in the sensitive areas, and the development of rocker arm manufacturing technology. As a result of conducted studies, the unit weight of the item was reduced by 25%, and the stress limit values were reduced to a level guaranteeing safe application.
    Źródło:
    Archives of Foundry Engineering; 2015, 15, 3; 95-98
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis by numerical calculations of the depth and dynamics of the penetration of ordered cellular structure made by casting from AlSi10Mg eutectic alloy
    Autorzy:
    Piekło, J.
    Pysz, S.
    Małysza, M.
    Karwiński, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/381188.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    cellular structure
    aluminium alloy
    FEM simulation
    struktura komórkowa
    stop aluminiowy
    symulacja MES
    Opis:
    Owing to high plastic deformability while maintaining stress values constant and relatively low, ordered cellular structures are characterised by excellent properties and the ability to dissipate the impact energy. Due to the low weight, structures of this type can be used, among others, for different parts of motor vehicles. For tests, a trapezoidal ordered cellular structure of 50.8 x 50.8 x 25.4 (mm) overall dimensions was selected. It was made as an investment casting from AlSi9Mg eutectic alloy by the method of Rapid Prototyping (RP). During FEM computations using an Abaqus programme, it was assumed that the material is isotropic and exhibits the features of an elastic – plastic body, introducing to calculations the, listed in a table, values of the stress-strain curve obtained in tensile tests performed on a MTS testing machine (10T). The computations used Johnson - Cook model, which is usually sufficiently accurate when modelling the phenomena of penetration of an element by an object of high initial velocity. The performed numerical calculations allowed identification of changes in speed and energy of the penetrator during structure perforation.
    Źródło:
    Archives of Foundry Engineering; 2011, 11, 3 spec.; 171-176
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Assessment of Durability of the Toothed Segment Based on FEM Analysis and Low Fatigue Cycle Test
    Autorzy:
    Piekło, J.
    Maj, M.
    Żuczek, R.
    Pysz, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/381408.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    design life cycle
    fatigue analysis
    fatigue criteria
    low fatigue cycle test
    cykl życia
    analiza zmęczeniowa
    kryteria zmęczeniowe
    niskocyklowe badanie zmęczeniowe
    Opis:
    The development of a novel design for the toothed segment of drive transmission in longwall shearer is expected to significantly reduce the cost of individual components of the feed system and the related work of repair and renovations, increasing at the same time the safety of mine repair teams. The conducted experimental and numerical analysis of the state of stress and strain in the innovative design of the toothed segment has enabled estimating the maximum effort of the developed structure. Based on the results of fundamental mechanical studies of the cast L20HGSNM steel and fatigue tests combined with the numerical stress/strain analysis, the fatigue life curve was plotted for the examined casting of the rack.
    Źródło:
    Archives of Foundry Engineering; 2016, 16, 4; 113-118
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Influence of the Microporosity on the Mechanical Properties of the AlZnMgCu Alloy, Based on the Numerical Analysis and Laboratory Trials
    Autorzy:
    Pysz, S.
    Żuczek, R.
    Piekło, J.
    Maj, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/379604.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    AlZnMgCu alloy
    microporosity
    mechanical properties
    low fatigue cycle test
    stop AlZnMgCu
    mikroporowatość
    właściwości mechaniczne
    niskocyklowe badanie zmęczeniowe
    Opis:
    The ecological meanings clearly indicates the need of reducing of the concentration of the CO2 in the atmosphere, which can be accomplished through the lowering of the fuel consumption. This fact implies the research for the new construction solutions regarding the reduction of the weight of vehicles. The reduced weight of the vehicle is also important in the case of application of the alternative propulsion, to extend the lifetime of the batteries with the reduction of recharge cycles. The use of cast alloy AlZnMgCu compliant of plastic forming class 7xxx alloy, are intended to significantly reduce the weight of the structures, while ensuring high strength properties. The wide range of the solidification temperature, which is more than 150°C, characterizes this alloy with a high tendency to create the micro and macro porosity. The study presents the relationship between the cooling rate and the area of occurrence and percentage of microporosity. Then the results were linked to the local tensile strength predicted in the simulation analysis. The evaluation of the microporosity was performed on the basis of the CT (computed tomography) and the analysis of the alloy microstructure. The microstructure analysis was carried out on test specimen obtained from the varying wall thickness of the experimental casting. The evaluation of the mechanical properties was prepared on the basis of the static tensile test and the modified low cycle fatigue test (MLCF).
    Źródło:
    Archives of Foundry Engineering; 2017, 17, 4; 137-142
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Design of a Cast Suspension Element, Determined by the Pressure Wave
    Autorzy:
    Żuczek, R.
    Maj, M.
    Piekło, J.
    Pysz, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/381073.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    multi-purpose cast
    optimal design
    mechanical properties
    AlZnMgCu alloy
    IDE explosion protection
    odlewanie
    projekt optymalny
    właściwości mechaniczne
    stop AlZnMgCu
    Opis:
    Based on the example of the development process of the cast suspension of a special-purpose vehicle the application of the integrated engineering design methodology (ICME – Integrated Computational Materials Engineering) and the development of construction has been presented. Identification of the operating and critical loads, which are guidelines for carrying out the structure strength shaping process, material and technological conversion, are due to the needs and requirements of the suspension system and the purpose and objectives of the special mobile platform. The developed cast suspension element construction includes the use of high-strength AlZnMgCu aluminum alloy. The properties of the used alloy and designed shape allows for the transfer of assumed operating loads in normal exploitation conditions and in the dynamic, critical loads to the susceptibility to damage in the assumed casting areas. For the proposed design, conducted numerical analyzes includes the impact of the shock wave pulse on the occurrence of the destructive stress fields. Based on their distribution, the areas of possible decomposition of the structure of the design element were estimated. The results allowed to devise an element with predicted destructions that allow to absorb a significant part of the impact energy of the shock wave front, which is also the buffer zone for the propagation of destruction for the critical kinematic nodes of the system.
    Źródło:
    Archives of Foundry Engineering; 2018, 18, 3; 59-64
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Low Cycle Mechanical and Fatigue Properties of AlZnMgCu Alloy
    Autorzy:
    Pysz, S.
    Czekaj, E.
    Żuczek, R.
    Maj, M.
    Piekło, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/379977.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    aluminium alloy
    high-strength
    low-cycle fatigue test
    mechanical properties
    stop aluminium
    wytrzymałość
    badanie zmęczeniowe
    właściwości mechaniczne
    Opis:
    The article presents the analysis of properties of the high-strength AlZnMgCu (abbr AlZn) aluminium alloy and estimates possibilities of its application for responsible structures with reduced weight as an alternative to iron alloy castings. The aim of the conducted studies was to develop and select the best heat treatment regime for a 7xx casting alloy based on high-strength materials for plastic working from the 7xxx series. For analysis, wrought AlZnMgCu alloy (7075) was selected. Its potential of the estimated as-cast mechanical properties indicates a broad spectrum of possible applications for automotive parts and in the armaments industry. The resulting tensile and fatigue properties support the thesis adopted, while the design works further confirm these assumptions.
    Źródło:
    Archives of Foundry Engineering; 2016, 16, 1; 55-60
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Making Artificial Heart Components – Selected Aspects Of Casting Technology
    Wykonywanie elementów sztucznego serca – wybrane aspekty technologii odlewniczej
    Autorzy:
    Sobczak, J.
    Karwiński, A.
    Leśniewski, W.
    Wieliczko, P.
    Gil, A.
    Pysz, S.
    Kowalski, P.
    Sobczak, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/353250.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Ti based alloys
    rapid prototyping
    pattern material
    ceramic moulds
    castings
    stopy na osnowie Ti
    szybkie prototypowanie
    wybór materiału
    formy ceramiczne
    odlewy
    Opis:
    This study shown possibilities of Rapid Prototyping techniques (RP) and metal casting simulation software (MCSS), including non inertial reference systems. RP and MCSS have been used in order to design and produce essential elements for artificial heart. Additionally it has been shown possibilities of Fused Deposition Modeling (FDM) technique and DodJet technology using prototyped elements of rotodynamic pump. MAGMASOFT® software allowed to verify the cast kit heart valves model. Optical scanner Atos III enabled size verification of experimental elements supplied by rapid prototyping together with metal casting elements. Due to the selection of ceramic materials and assessment of molten metal – ceramic reactivity at high temperatures together with pattern materials selection model it was possible to design, manufacture a ceramic mould for titanium based alloys. The casting structure modification has been carried out by means of high isostatic pressure technique (HIP). The quality assessment of the casting materials has been performed using X-ray fluorescence (XRF), ARL 4460 Optical Emission Spectrometer, metallographic techniques and X-ray computed tomography.
    W artykule przedstawiono wykorzystanie technik szybkiego prototypowania oraz programów do symulacji przepływów stopów odlewniczych, w tym w nieinercyjnych układach odniesienia, do projektowania, a następnie wykonania elementów sztucznego serca. Zaprezentowano kolejno technikę Fused Deposition Modeling (FDM) oraz technologię DodJet na przykładzie wykonania prototypowych elementów pomp wirowych. Program MAGMASOFT® pozwolił zweryfikować projekt zestawu odlewniczego zastawki serca. Zastosowanie skanera optycznego Atos III umożliwiło weryfikację wymiarów doświadczalnych elementów otrzymanych przy wykorzystaniu technik RP oraz elementów odlewanych. Dzięki doborowi materiałów ceramicznych pod kątem oceny ich reakcji z ciekłym metalem oraz doborowi mas modelowych możliwe było opracowanie doświadczalnych form ceramicznych przeznaczonych do odlewania stopów tytanu. Modyfikację struktury odlewów wykonano przy zastosowaniu obróbką techniką HIP. Ocenę jakości wykonanych odlewów przeprowadzono kolejno metodą mikrofluorescencji rentgenowskiej, emisyjnym spektrometrem optycznym, technikami metalograficznymi oraz rentgenowską tomografią komputerową.
    Źródło:
    Archives of Metallurgy and Materials; 2015, 60, 3; 2191-2208
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Stack and draw fabrication of soft glass microstructured fiber optics
    Autorzy:
    Pysz, D.
    Kujawa, I.
    Stępień, R.
    Klimczak, M.
    Filipkowski, A.
    Franczyk, M.
    Kociszewski, L.
    Buźniak, J.
    Haraśny, K.
    Buczyński, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/201960.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    miękkie szkło
    włókno fotoniczne
    kryształ
    włókno mikrostrukturyzowane
    optyka nieliniowa
    soft glass
    stack and draw
    image guide
    photonic crystal fiber
    microstructured fiber
    nonlinear optics
    Opis:
    A broad review is given of microstructured fiber optics components - light guides, image guides, multicapillary arrays, and photonic crystal fibers - fabricated using the stack-and-draw method from various in-house synthesized oxide soft glasses at the Glass Department of the Institute of Electronic Materials Technology (ITME). The discussion covers fundamental aspects of stack-and-draw technology used at ITME, through design methods, soft glass material issues and parameters, to demonstration of representative examples of fabricated structures and an experimental characterization of their optical properties and results obtained in typical applications. Specifically, demonstrators include microstructured image guides providing resolution of up to 16000 pixels sized up to 20 μm in diameter, and various photonic crystal fibers (PCFs): index-guiding regular lattice air-hole PCFs, hollow core photonic bandgap PCFs, or specialty PCFs like highly birefringent microstructured fibers or highly nonlinear fibers for supercontinuum generation. The presented content is put into context of previous work in the area reported by the group of authors, as well as other research team.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2014, 62, 4; 667-682
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-9 z 9

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