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    Wyświetlanie 1-3 z 3
    Tytuł:
    The effect of material gradient on the static and dynamic response of layered functionally graded material plate using finite element method
    Autorzy:
    Vasiraja, N.
    Nagaraj, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/201107.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    FGM plate
    finite element
    power law index
    buckling load
    fundamental frequency
    ANSYS®
    Opis:
    This article focuses on the finite element analysis (FEA) of the nonlinear behavior of a layered functionally graded material (FGM) plate as concerns displacement, stresses, critical buckling load and fundamental frequency. The material properties of each layer in an FGM plate are assessed according to a ceramic based simple power law distribution and the rules of mixture. The finite element model of a layered FGM plate is developed using ANSYS®15.0 software. The developed finite element model is used to study the static and dynamic responses of an FGM plate. In this paper, the effects of power law distribution, thickness ratio, aspect ratio and boundary conditions are investigated for central displacement, transverse shear stress, transverse normal stress, critical buckling load and fundamental frequency, and the obtained FEA results are in sound agreement with the literature test data results. Since the FGM is used in a high temperature environment, the FE analysis is performed for the FGM plate under a thermal field and then correlated. Finally, the FGM plate is analyzed under a thermomechanical load by using the current FE concept.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2019, 67, 4; 827-838
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    MHD effects on non-Newtonian power-law fluid past a continuously moving porous flat plate with heat flux and viscous dissipation
    Autorzy:
    Kishan, N.
    Shashidar Reddy, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/264635.pdf
    Data publikacji:
    2013
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    wpływ pola magnetycznego
    płyn nienewtonowski
    magnetic field effects
    non-Newtonian fluid
    power-law index
    viscous dissipation and suction/injection
    Opis:
    The problem of a magneto-hydro dynamic flow and heat transfer to a non-Newtonian power-law fluid flow past a continuously moving flat porous plate in the presence of sucion/injection with heat flux by taking into consideration the viscous dissipation is analysed. The non-linear partial differential equations governing the flow and heat transfer are transformed into non-linear ordinary differential equations using appropriate transformations and then solved numerically by an implicit finite difference scheme. The solution is found to be dependent on various governing parameters including the magnetic field parameter M, power-law index n, suction/injection parameter ƒw, Prandtl number Pr and Eckert number Ec. A systematical study is carried out to illustrate the effects of these major parameters on the velocity profiles, temperature profile, skin friction coefficient and rate of heat transfer and the local Nusslet number.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2013, 18, 2; 425-445
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Forecasting the critical points of stock markets’ indices using log-periodic power law
    Autorzy:
    Korzeniowski, Piotr
    Kuropka, Ireneusz
    Powiązania:
    https://bibliotekanauki.pl/articles/425256.pdf
    Data publikacji:
    2013
    Wydawca:
    Wydawnictwo Uniwersytetu Ekonomicznego we Wrocławiu
    Tematy:
    Log-Periodic Power Law
    critical point of stock market index
    forecast
    Opis:
    This article presents Log-Periodic Power Law and considers its usefulness as a forecasting tool on the financial markets. One of the estimation methods of this function was presented and six models were built, based on time series of the DJIA and the WIG20. Estimated models were utilized to predict crashes of those indices. The variations between the actual values of analyzed indices observed in the forecasted period and values observed in the actual period of their downturn were assembled to assess the results. In three cases, relative errors were below 5%; and in three cases, they were higher than 15%.
    Źródło:
    Econometrics. Ekonometria. Advances in Applied Data Analytics; 2013, 1(39); 100-110
    1507-3866
    Pojawia się w:
    Econometrics. Ekonometria. Advances in Applied Data Analytics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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