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    Wyświetlanie 1-6 z 6
    Tytuł:
    Evaluation of structure and properties of welded joint of magnesium alloy EZ33A-T5
    Autorzy:
    Kocurek, R.
    Adamiec, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/380590.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    mechanical properties
    weldability of alloy
    magnesium alloy
    EZ33
    microstructure
    quantitative procedure
    właściwości mechaniczne
    spawalność stopu
    stop magnezu
    mikrostruktura stopu
    metoda ilościowa
    Opis:
    In recent years, improvement of casting magnesium alloys welding technology has resulted in an increase in the number of publications on this topic. The symptom of this trend is to replace traditional construction materials of magnesium alloys. Magnesium alloys of Mg-Zn-RE-Zr group are used in the automotive, aerospace and defense industries, mainly as gravitional casts to sand moulds or die-casting. Casting defects often appear in these casts (misruns, micro-shrinkage, cracks). The welding technologies are most often applicable to repair of casts, mainly nonconsumable electrode welding in the inert gas cover. The premise of this research work was to define structure and mechanical properties of welded joints of magnesium alloy EZ33A-T5. For this purpose, were attempted trails welding and conducted non-destructive testing, metallographic and strength mechanical tests allowing to assess the properties of welded joints. Evaluation of properties of welded joints was possible by carrying out welding trials and execution of non-destructive tests and metallographic. Research of the microstructure was used with the methodology and test procedures for the quantitative evaluation of the structure of welded joints which was developed in the Department of Materials Science of Silesian University of Technology.
    Źródło:
    Archives of Foundry Engineering; 2013, 13, 1 spec.; 65-71
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Passive Structural Acoustic Control of the Smart Plate - FEM Simulation
    Autorzy:
    Kozień, M.
    Wiciak, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1506800.pdf
    Data publikacji:
    2010-12
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    33.15.Mt
    34.50.Ez
    77.22.Gm
    Opis:
    Finite element simulations of passive damped system applied to the simply-supported excited squared steel plate, is the aim of the analysis. The full mechanical, piezoelectric, electric and acoustic field coupling is analysed in Ansys Package. As the result the acoustic pressure radiated by plate is analysed. The results show possibility of application of the discussed method to reduction of the sound pressure level in realistic engineering structures.
    Źródło:
    Acta Physica Polonica A; 2010, 118, 6; 1186-1188
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A Study on Possibility to Apply Piezoelectric Actuators for Active Reduction of Torsional Beams Vibrations
    Autorzy:
    Augustyn, E.
    Kozień, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1196928.pdf
    Data publikacji:
    2014-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    33.15.Mt
    34.50.Ez
    77.22.Gm
    Opis:
    In this paper, the results of several tests concerning possible application of piezoelectric elements to reduce torsional vibrations of a beam are presented and discussed. The proposed method of application is a novel one. The piezoelectric elements are positioned in two pairs and glued to the beam at the chosen cross-section. These elements are activated using a harmonically varying voltage of the same amplitude and opposite in phase. Simulations are performed regarding the active reduction of the lowest natural frequencies of vibration of the fixed-free beam with the use of piezoelectric actuators. The results of these simulations are obtained by means of the finite element method (ANSYS).
    Źródło:
    Acta Physica Polonica A; 2014, 125, 4A; A-164-A-168
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparison of Active and Passive Damping of Plate Vibration by Piezoelectric Actuators - FEM Simulation
    Autorzy:
    Kozień, M.
    Kołtowski, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/1504386.pdf
    Data publikacji:
    2011-06
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    33.15.Mt
    34.50.Ez
    77.22.Gm
    Opis:
    Application of piezoelectric shunt elements, distributed in suitable configuration on the external surfaces of vibrating plate is one of the contemporary method of reduction of its vibroactivity. The two techniques are applied: passive one and active one. The aim of simulations was to compare the minimisation effect for the two attempts. The plate was excited by point harmonic force with constant amplitude. Vibrations for the first mode were considered.
    Źródło:
    Acta Physica Polonica A; 2011, 119, 6A; 1005-1008
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Simulation of Application of FGM Piezoelectric Actuators for Active Reduction of Beam Vibrations
    Autorzy:
    Ferdek, U.
    Kozień, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1400085.pdf
    Data publikacji:
    2013-06
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    33.15.Mt
    34.50.Ez
    77.22.Gm
    Opis:
    In the paper results of simulation of active reduction of vibration of the free-fixed beam by piezoelectic actuators made of functionally graded materials are presented. The aim of simmulation was to estimate sensitivity of the process of reduction. The effect of the level of gradation of material properties and amplitude of the applied voltage on effectiveness of the reduction process was analyzed. The analysis was reduced to the case of excited vibrations of the first mode and was performed by application of the finite element package Ansys.
    Źródło:
    Acta Physica Polonica A; 2013, 123, 6; 1044-1047
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Choosing of Optimal Voltage Amplitude of Four Pairs Square Piezoelectric Elements for Minimization οf Acoustic Radiation of Vibrating Plate
    Autorzy:
    Kozień, M.
    Wiciak, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1807735.pdf
    Data publikacji:
    2009-09
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    43.20.Tb
    33.15.Mt
    34.50.Ez
    77.22.Gm
    Opis:
    The study is a next part of earlier works by the authors, and explores how does the sequence of activated actuators and the level of applied voltage affect the radiated acoustic energy. The analysis uses the finite element method for structural vibrations and combination of the finite element and the intensity hybrid method to assess the level of sound radiation. The vibrating element is a steel plate with glued on actuators, supported on one edge and excited by a harmonically variable, concentrated load with a constant amplitude value.
    Źródło:
    Acta Physica Polonica A; 2009, 116, 3; 348-350
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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