Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

English (EN)·Polski (PL)·Yкраїнський (UK)
Przejdź do strony domowej biblioteki Centralna Biblioteka Wojskowa Link otwiera się w nowym oknie Logo biblioteki Prolib Integro - strona głównaCentralna Biblioteka Wojskowa

Wyszukujesz frazę "Madej, K." wg kryterium: Autor

  Lista filtrów
Wyrównaj
    Wyświetlanie 1-12 z 12
    Tytuł:
    Numerical analysis of influence of the martensite volume fraction on DP steels behavior during plastic deformation
    Analiza numeryczna wpływu ułamka objętości martenzytu na zachowanie stali DP podczas odkształcenia plastycznego
    Autorzy:
    Perzyński, K.
    Madej, Ł.
    Powiązania:
    https://bibliotekanauki.pl/articles/350830.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    pękanie
    stal dwufazowa
    cyfrowa reprezentacja materiału
    fracture
    dual-phase steel
    digital material representation
    Opis:
    Development of a comprehensive fracture model, which takes into account crack initiation and propagation behavior at the microscale level in the Dual Phase (DP) steels is presented in the present paper. At this stage of the research Authors proposed a numerical model, which takes into account ductile crack initiation and propagation through the ferrite phase. Developed model is based on digital material representation (DMR) of DP microstructure, which takes opportunity for modeling crack phenomena in an explicit manner. Proposed model of ductile crack behavior in the ferritic phase is based on the Johnson-Cook model. Particular attention is put on investigation of influence of martensite volume fraction in microstructure on failure behavior. Obtained results for two significantly different martensite volume fractions in the investigated microstructure are presented in this work.
    Celem niniejszej pracy jest opracowanie kompleksowego wieloskalowego modelu pękania uwzględniającego mechanizmy inicjalizacji oraz propagacji uszkodzeń na poziomie mikrostruktury w stalach dwu fazowych typu dual-phase (DP). Na tym etapie pracy zaproponowano model numeryczny, który uwzględnia mechanizmy powstawania i propagacji pęknięć o charakterze ciągliwym. Opracowany model bazuje na jawnej cyfrowej reprezentacji mikrostruktury, która pozwala na dokładne odzwierciedlenie zjawiska pękania występującego w materiale. W modelu wykorzystano podejście oparte o model Johnsona-Cooka do opisu ciągliwego pękania propagującego się w ferrycie. Głównym celem pracy jest analiza wpływu ułamka objętości martenzytu w mikrostrukturze na charakter propagacji pęknięć. Opracowany model oraz uzyskane wyniki obliczeń dla dwóch mikrostruktur o diametralnie różnym ułamku objętościowym martenzytu przedstawiono w niniejszej pracy.
    Źródło:
    Archives of Metallurgy and Materials; 2013, 58, 1; 211-215
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Numerical modeling of fracture during nanoindentation of the TiN coatings obtained with the PLD process
    Autorzy:
    Perzyński, K.
    Madej, Ł.
    Powiązania:
    https://bibliotekanauki.pl/articles/202038.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    crack
    nanoindentation
    nanolayers
    TiN
    XFEM
    Opis:
    In order to improve mechanical, frictional or biocompatibility behavior of well know materials like titanium (Ti) or titanium nitride (TiN) scientists are trying to develop new manufacturing and processing operations. One of those methods, that provide interesting results, is called deposition process. During deposition a material is upgraded with new surface layers that are characterized by specific required properties. These layers have usually different mechanical properties in comparison with a substrate material. A combination of different properties of the deposited layers can significantly change behavior of the structure under an exploitation condition. However, layers have usually nanometer scale, which causes problems with performing standard plastometric tests. One of the possibilities to solve this issue is an application of specially designed tests like nanoindentation. Nanoindentation can provide valuable information regarding mechanical and strength behavior of nanostructure components. These investigations are of importance to properly identify and design properties of the mentioned deposited materials. Unfortunately, experimental analyses at these scales are usually very expensive. That is why Authors decided to develop a numerical model of the nanoindentation test to investigate material behavior under loading conditions that can support experimental research. The overall aim of this research is development of a failure model, which can take into account morphology of microstructure of ceramic TiN layer deposited on the silicon substrate. Modeling of crack behavior was realized on the basis of the extended finite element method (XFEM).
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2013, 61, 4; 973-978
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modelling of Material Flow During Incremental Forming Process on the Basis of Digital Material Representation Concept
    Autorzy:
    Szyndler, J.
    Perzynski, K.
    Madej, Ł.
    Powiązania:
    https://bibliotekanauki.pl/articles/100177.pdf
    Data publikacji:
    2015
    Wydawca:
    Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
    Tematy:
    forging
    numerical modelling
    aluminum
    Opis:
    The main goal of the work is development of the multiscale numerical model of the incremental forming process for manufacturing integral elements applicable in the aerospace industry. Description of the proposed incremental forming concept based on division of large die into a series of small anvils pressed into the material by a moving roll is presented. A complex multi scale numerical model of mentioned incremental forging process based on the digital material representation (DMR) concept was developed and is also described within the paper. Finally, obtained results in the form of strain distribution are presented and compared with the outcome from conventional forging at the macro and micro scale, respectively.
    Źródło:
    Journal of Machine Engineering; 2015, 15, 1; 81-89
    1895-7595
    2391-8071
    Pojawia się w:
    Journal of Machine Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Numerical Investigation of the Influence of Pulsed Laser Deposited Tin Thin Film Morphology on Deformation Inhomogeneities
    Autorzy:
    Perzyński, K.
    Zych, D.
    Sitko, M.
    Madej, Ł.
    Powiązania:
    https://bibliotekanauki.pl/articles/353619.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    thin films
    pulsed laser deposition
    digital material representation
    homogenization
    finite element method
    Opis:
    In vestigation of influence of TiN thin film morphology on deformation inhomogeneities is an overall subject of the research. Numerical modelling approach that was selected for the study is based on the digital material representation concept, which gives an opportunity to directly replicate columnar microstructure morphology of an investigated thin film. Particular attention in this paper is put on the discussion of the influence of cellular automata neighbourhood on thin-film digital morphologies and their further deformation behaviour. Additionally, an evaluation of representativeness aspects of the digital models, in particular, the analysis of the influence of a number of columns, their dimensions and variations in their properties on the material behaviour during compression tests is also presented. The non-periodic boundary conditions are assumed during the investigation. Obtained data in the form of equivalent stress distributions as well as homogenized stress-strain curves from analyzed case studies are presented and discussed within the paper.
    Źródło:
    Archives of Metallurgy and Materials; 2020, 65, 2; 713-720
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    RCAFE Based Numerical Model of Dynamic Recrystallization
    Autorzy:
    Legwand, A.
    Sitko, M.
    Perzyński, K.
    Madej, Ł.
    Powiązania:
    https://bibliotekanauki.pl/articles/100012.pdf
    Data publikacji:
    2016
    Wydawca:
    Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
    Tematy:
    cellular automata
    RCAFE
    recrystallization
    Opis:
    The main goal of the paper is dedicated to proper arrangement of the Finite Element (FE) and Random Cellular Automata (RCA) methods in order to develop numerical model of dynamic recrystallization (DRX) and therefore to simulate microstructure morphology changes during plastic deformation at elevated temperatures. In the approach, Finite Element solver provides information on equivalent stress and strain fields after subsequent time steps. Then these data are transferred to RCA model, which is responsible for evaluation of corresponding microstructure morphology evolution and dislocation density changes. Finally, information from the CA part is send back to the FE solver as an input for the next time step. As a result, a fully coupled RCAFE model to simulate progress of DRX is established. The present paper is directly focused on development of algorithms and methods to transfer input/output data between both FE and RCA models. The developed communication protocol is based on the Abaqus VUMAT subroutine. Examples of obtained results from the developed model are also presented to highlight its potential.
    Źródło:
    Journal of Machine Engineering; 2016, 16, 2; 52-60
    1895-7595
    2391-8071
    Pojawia się w:
    Journal of Machine Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Numerical modelling of innovative manufacturing processes with induced strain path changes
    Autorzy:
    Muszka, K.
    Madej, Ł.
    Graca, P.
    Majta, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/100123.pdf
    Data publikacji:
    2013
    Wydawca:
    Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
    Tematy:
    strain path
    accumulative angular drawing
    FE modelling
    Opis:
    A review of various bulk metal forming processes that take into account influence of strain path changes on material flow is presented in this paper. Particular attention is put on computer aided design of innovative angular accumulative drawing (AAD) operation. Research in the area of development of metal forming processes taken advantage of strain path phenomena is conducted in many scientific laboratories as the strain patch change effect influences many crucial properties of the deformed material. As a result it provides a possibility of forming materials, which are e.g. difficult to form in a conventional manner. Advantages and limitations of the AAD process are summarized and presented in this work. Difficulties in development of the complex rheological model that takes in to account strain path changes in the deformed material are also presented and discussed.
    Źródło:
    Journal of Machine Engineering; 2013, 13, 2; 59-68
    1895-7595
    2391-8071
    Pojawia się w:
    Journal of Machine Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of the stress concentration in the nanomultilayer coatings based on digital representation of the structure
    Numeryczna analiza koncentracji naprężeń w wielowarstwowych nanopowłokach na bazie cyfrowej reprezentacji materiału
    Autorzy:
    Perzyński, K.
    Major, Ł.
    Madej, Ł.
    Pietrzyk, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/351065.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    automaty komórkowe (CA)
    TEM
    nanomateriał
    XFEM
    cellular automata (CA)
    layers depositions
    nanomaterials
    Opis:
    Investigation of the stress concentration in the nanomultilayer materials under exploitation conditions is the main objective of the work. During loading a failure can initiate and propagate, which have important impact on material strength and reliability. This is of importance when materials for biological applications are considered. Special features of the investigated material, including irregular shape of the boundaries and columnar structure of these layers lead to growth of local stresses in the material and may be responsible for mentioned instabilities. To capture this behavior during numerical modeling an innovative solutions are required. Authors propose numerical simulation, which combines algorithms of the deposition process for realistic digital material representation of coatings and finite element (FE) approach for modeling of material behavior under loading. Algorithm of the deposition process is implemented using the cellular automata (CA) approach. Based on the developed model, a simple plastometric compression tests are simulated to analyze stress distribution in the material and possibility of failure initiation. These results are compared qualitatively with experimental data, including ball-on-test and transmission electron microscope (TEM) observation. Obtained results are the basis for development of a numerical model for fracture propagation with adopted extended finite element method (XFEM).
    Głównym celem pracy jest zaproponowanie podejścia numerycznego umożliwiającego analizę koncentracji naprężeń w materiałach o strukturze nanowarstwowej przeznaczonych dla bioinżynierii. Jest to szczególnie istotne w przypadku prowadzenia analizy zachowania się materiałów w warunkach eksploatacji ponieważ umożliwia zlokalizowanie miejsc szczególnie narażonych na uszkodzenia. Do przeprowadzenia szczegółowej analizy numerycznej konieczne jest uwzględnienie typowych cech nanowarstwowego materiału np. nieregularnego kształtu granicy pomiędzy warstwami. W tym celu Autorzy zastosowali model MES sprzężony z jawną reprezentacją mikrostruktury i automatami komórkowym (CA). Model na bazie CA uwzględnia wspomniane specyficzne cechy analizowanych materiałów. W pracy przedstawiono algorytm generowania cyfrowej reprezentacji nanowarstw oraz wyniki symulacji z wykorzystaniem opracowanego modelu numerycznego dla warstw bez uwzględnienia chropowatości granicy międzywarstwowej, jak i z jej uwzględnieniem. Uzyskane wyniki w formie rozkładów naprężeń stały się podstawą do opracowania modelu procesu pękania w analizowanych materiałach z wykorzystaniem metody eXtended Finite Element Method (XFEM). Przykłady uzyskanych wyników również zamieszczono w niniejszej pracy.
    Źródło:
    Archives of Metallurgy and Materials; 2011, 56, 2; 393-399
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Numerical Evaluation of Gear Ring Behavior During Various Cooling Conditions
    Autorzy:
    Perzyński, K.
    Madej, Ł.
    Szajding, A.
    Raga, K.
    Kubiak, K.
    Niechajowicz, A.
    Jaskiewicz, K.
    Gronostajski, Z.
    Pietrzyk, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/99546.pdf
    Data publikacji:
    2016
    Wydawca:
    Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
    Tematy:
    bainitic transformation
    martensitic transformation
    finite element analysis
    APDL
    Opis:
    The phase transformation model incorporated via the user subroutines to the commercial finite element software to accurately predict changes occurring during cooling of metallic components is presented in the paper. The cooling process of steel rings used in airplanes was selected as a case study. Particular attention was put on heterogeneities occurring in temperature field, which influence phase transformations and eventually residual stresses. Developed model was used in the present work to evaluate influence of different cooling conditions on ring behaviour.
    Źródło:
    Journal of Machine Engineering; 2016, 16, 2; 18-26
    1895-7595
    2391-8071
    Pojawia się w:
    Journal of Machine Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Numerical Investigation of an Explosive Welding of Ti/Cu Plates Based on a Meshfree Method
    Autorzy:
    Mojżeszko, M.
    Perzyński, K.
    Sionkowski, M.
    Paul, H.
    Madej, Ł.
    Powiązania:
    https://bibliotekanauki.pl/articles/353823.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    explosive welding
    CEL
    SPH
    digital material representation
    Opis:
    Development of a reliable numerical model capturing major physical mechanisms controlling explosive welding and considering properties of all process components i.e. base plate and flyer plate is the goal of the paper. To properly replicate materials behavior under these severe conditions a meshfree approach, namely Smooth Particle Hydrodynamics (SPH), was used to discretize the computational domain. The model is based on the Mie-Gruneisen shock equation of state applied to the Ti/Cu system as a case study. Examples of results in the form of velocity, equivalent stress, equivalent strain, and pressure fields are presented within the paper.
    Źródło:
    Archives of Metallurgy and Materials; 2020, 65, 2; 707-711
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Microstructure-Based Numerical Modelling of Manufacturing Processes of Nanolayered Materials
    Autorzy:
    Muszka, K.
    Madej, Ł.
    Graca, P.
    Stefańska-Kądziela, M.
    Majta, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/99911.pdf
    Data publikacji:
    2014
    Wydawca:
    Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
    Tematy:
    nanolayered steel
    severe plastic deformation
    FEM modelling
    Opis:
    Recent development in the field of numerical modelling of innovative manufacturing processes, in which nanolayered materials can be produced, is presented in the paper. Combination of the Angular Accumulative Drawing, continuous wire drawing and wire flattening were used to produce thin nanolayers that will be used for subsequent production of nanolayered metal strips using Accumulative Roll Bonding process. Proposed methodology combines microstructural aspects of deformation such as strain-induced precipitation processes and development of dislocation substructures. Additionally, multiscale modelling approach based on the 3D Digital Materials Representation was utilized to support experimental research and to investigate inhomogeneous material behaviour during deformation. Proposed methodology provides a possibility of forming materials, which are e.g. difficult to form in a conventional manner. Advantages and limitations of the proposed model are summarized and discussed with respect to its potential application to precipitation strengthened bcc nanolayered materials.
    Źródło:
    Journal of Machine Engineering; 2014, 14, 1; 39-52
    1895-7595
    2391-8071
    Pojawia się w:
    Journal of Machine Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Green wave optimization
    Autorzy:
    Bazan, M.
    Ciskowski, B.
    Halawa, K.
    Janiczek, T.
    Madej, Ł.
    Rusiecki, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/393363.pdf
    Data publikacji:
    2016
    Wydawca:
    Polskie Stowarzyszenie Telematyki Transportu
    Tematy:
    green wave optimization
    ITS simulation
    road traffic simulations
    symulacja ITS
    symulacje ruchu drogowego
    Opis:
    In this paper we present the results of global optimization of green wave parameters (offsets, opening times, speed limit) for the main artery in the city of Wrocław (Poland). The optimization process was performed in ArsNumerica Execution Environment [1] and involved two different objective functions: the average waiting time and the average queue length. Both approaches were compared by calculating the number of vehicles that pssed the artery in a prescribed time.
    Źródło:
    Archives of Transport System Telematics; 2016, 9, 3; 3-8
    1899-8208
    Pojawia się w:
    Archives of Transport System Telematics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Intelligent Transport System auditing using road traffic micro-simulation
    Autorzy:
    Bazan, M.
    Ciskowski, P.
    Halawa, K.
    Janiczek, T.
    Kozaczewski, P.
    Madej, Ł.
    Rusiecki, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/393731.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Stowarzyszenie Telematyki Transportu
    Tematy:
    traffic modeling
    intelligent transportation system
    road traffic simulations
    modelowanie ruchu
    inteligentny system transportowy
    symulacje ruchu drogowego
    Opis:
    ITS systems have been deployed for last one and a half decades. Their aim is to increase a traffic flow rate in a road network of an urbanized area, to improve the comfort of driving as well as to decrease the pollution. A lot of commercial software are is available to simulate road traffic in urbanized areas. Some of them are suitable to perform traffic simulations of intelligent transportation systems via traffic modeling. A process of traffic modeling exploiting numerical simulations for an urban area where an ITS is deployed requires provision of digital maps, traffic demand amongst city zones, traffic signalization micro-programs being executed in the environment that can imitate a dynamic behavior of traffic lights at intersections in the ITS. In this paper an execution environment, developed by the Ars Numerica Group, that launches a road traffic micro-simulation is used to audit a performance of intersections’ signalization micro-programs on one of the main arteries in the city of Wrocław (Poland).
    Źródło:
    Archives of Transport System Telematics; 2015, 8, 4; 3-8
    1899-8208
    Pojawia się w:
    Archives of Transport System Telematics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-12 z 12

      Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies