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    Wyświetlanie 1-7 z 7
    Tytuł:
    Bending of a generalized circular sandwich plate under a concentrated force with consideration of an improved shear deformation theory
    Autorzy:
    Magnucki, K.
    Magnucka-Blandzi, E.
    Wittenbeck, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/38695688.pdf
    Data publikacji:
    2022
    Wydawca:
    Instytut Podstawowych Problemów Techniki PAN
    Tematy:
    circular sandwich plate
    shear deformation theory
    axisymmetric bending
    Opis:
    The paper is devoted to an axisymmetric bending problem of a generalized circular sandwich plate with continuous variation of mechanical properties in the thickness direction of the core. The plate is clamped and carries a concentrated force in its center. The improved shear deformation theory of the normal straight line to the neutral surface is elaborated. The deformation of this normal straight line is graphically presented for the exemplary sandwich structures of the plate. Two differential equation of equilibrium of the plate are obtained based on the principle of stationary potential energy. This system of equations is analytically solved and the maximum deflection of the example plates are derived. Moreover, the deformation of the normal strain line and the maximum deflection of the plate are calculated numerically (FEM). Results of these calculations are compared.
    Źródło:
    Archives of Mechanics; 2022, 74, 4; 267-282
    0373-2029
    Pojawia się w:
    Archives of Mechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Three models of a sandwich beam: bending, buckling, and free vibrations
    Autorzy:
    Magnucki, Krzysztof
    Magnucka-Blandzi, Ewa
    Wittenbeck, Leszek
    Powiązania:
    https://bibliotekanauki.pl/articles/38884025.pdf
    Data publikacji:
    2022
    Wydawca:
    Instytut Podstawowych Problemów Techniki PAN
    Tematy:
    shear deformation theory
    deflection; critical load
    fundamental natural frequency
    Opis:
    This paper is devoted to the analytical modelling of a sandwich beam. Three models of this beam are elaborated. Two nonlinear individual shear theories of deformation of a plane cross-sections are proposed. Based on Hamilton’s principle, two differential equations of motion for each model are obtained. The bending, buckling and free flexural vibration problems of the simply-supported sandwich beam considering these three models are studied. The results of these analytical investigations are presented in tables.
    Źródło:
    Engineering Transactions; 2022, 70, 2; 97-122
    0867-888X
    Pojawia się w:
    Engineering Transactions
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Three-point bending of a beam with non-homogeneous structure in the depth direction
    Autorzy:
    Magnucki, Krzysztof
    Magnucka-Blandzi, Ewa
    Witkowski, Dawid
    Wittenbeck, Leszek
    Powiązania:
    https://bibliotekanauki.pl/articles/38912690.pdf
    Data publikacji:
    2023
    Wydawca:
    Instytut Podstawowych Problemów Techniki PAN
    Tematy:
    non-homogeneous beam
    shear deformation theory
    three-point bending
    Opis:
    This paper is devoted to the behavior of a non-homogeneous simply supported beam under three-point bending. The individual shear deformation function of a planar cross-section is adopted, and longitudinal displacements, strains, and stresses for two parts of the beam are explained. By applying the principle of stationary potential energy, a system of two differential equations of equilibrium is derived and solved analytically. The positions of the neutral axis, shear coefficients, and deflections are then calculated for three different beam families. Additionally, the bending problem of these beams is studied numerically using the finite element method (FEM). The results of both analytical and numerical calculations are presented in tables and figures. The main contribution of this paper lies in the development of an analytical model incorporating the individual shear deformation function and a numerical FEM model for this beam.
    Źródło:
    Engineering Transactions; 2023, 71, 4; 645-665
    0867-888X
    Pojawia się w:
    Engineering Transactions
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Hygrothermoelastic buckling response of composite laminates by using modified shear deformation theory
    Autorzy:
    Kazemi, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/949126.pdf
    Data publikacji:
    2018
    Wydawca:
    Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
    Tematy:
    angle-ply laminate
    buckling
    composite plate
    finite element method
    shear deformation theory
    Opis:
    In this study, a finite element based formulation is developed for analyzing the buckling and post-buckling of composite laminates subjected to mechanical and hygrothermal loads using Modified Hyperbolic Shear Deformation Theory (MHSDT). The changes in the critical buckling load are presented for different lamination schemes, thicknesses, material properties and plate aspect ratios. In addition, post buckling analysis is performed for a composite plate subjected to uniform in-plane thermal and moisture induced loadings by using MHSDT. Matlab software has been used for programming the analysis. The results obtained by Matlab codes are in a satisfactory consistence compared to the references. Thus, the developed MHSDT has been validated for buckling and post buckling analysis of laminated plates in hygrothermal environment.
    Źródło:
    Journal of Theoretical and Applied Mechanics; 2018, 56, 1; 3-14
    1429-2955
    Pojawia się w:
    Journal of Theoretical and Applied Mechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Static bending of isotropic circular cylindrical shells based on the higher order shear deformation theory of Reddy and Liu
    Autorzy:
    Nwoji, C. U.
    Ani, D. G.
    Oguaghamba, O. A.
    Ibeabuchi, V. T.
    Powiązania:
    https://bibliotekanauki.pl/articles/2106454.pdf
    Data publikacji:
    2021
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    ścinanie poprzeczne
    powłoka Kirchhoffa-Love'a
    zginanie
    isotropic circular cylindrical shell
    shear deformation theory
    transverse shear
    principle of virtual works
    Kirchhoff-Love theory
    Opis:
    In this paper, a displacement based shear deformation theory formulated on the cubic in-plane displacement field equation of Reddy and Liu is presented for the static bending analysis of isotropic circular cylindrical shells. The adopted displacement field accounts for a quadratic (parabolic) distribution of the transverse shear through the shell thickness as well as satisfies the need for a stress free upper and lower boundary surfaces of the shell. The equations of static equilibrium are obtained on application of the principle of virtual work. Numerical results of the bending analysis for the displacements and stresses are presented for the simply supported shell. A comparison made to those of the Kirchhoff-Love theory for varying shell length to mean – radius of curvature ratios, shows good agreement for thin shells irrespective of the shell length to radius of curvature ratio [...]. The transverse sharing effect is found to be noticeable in the deformation of thick shells, however, this effect diminishes with a continuous increase in [...] ratios.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2021, 26, 3; 141--162
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Hybrid sandwich panels: a review
    Autorzy:
    Sandeep, S. H.
    Srinivasa, C. V.
    Powiązania:
    https://bibliotekanauki.pl/articles/1839800.pdf
    Data publikacji:
    2020
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    belka
    laminat
    drgania
    odkształcenie
    beams
    shells
    fibre metal laminate
    free vibration
    natural frequency
    sandwich plates
    sandwich cylindrical shells
    beams theories
    higher-order theory
    shear deformation theory
    Opis:
    A high specific stiffness, high specific strength, and tailoring the properties for specific application hale attracted the attention of the researchers to work in the field of laminated composites and Sandwich structures. Rapid use of these laminated composites and Sandwich structures necessitated the development of new theories that suitable for the bending, buckling and vibration analysis. Many articles were published on free vibration of beams, plates, shells laminated composites and sandwich structures. In this article, a review on free vibration analysis of shear deformable isotropic beams, plates, shells, laminated composites and sandwich structures based on various theories and the exact solution is presented. In addition to this, the literature on finite element modeling of beams, plates, shells laminated composites and sandwich structures based on classical and refined theories is also reviewed. The present article is an attempt to review the available literature, made in the past few decades on free flexural vibration response of Fiber Metal laminated Composites and Sandwich panels using different analytical models, numerical techniques, and experimental methods.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2020, 25, 3; 64-85
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Free Vibration Analysis of A357 Alloy Reinforced with Dual Particle Size Silicon Carbide Metal Matrix Composite Plates Using Finite Element Method
    Autorzy:
    Lakshmikanthan, A.
    Mahesh, V.
    Prabhu, R. T.
    Patel, M. G. C.
    Bontha, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1837831.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    finite element method
    shear deformation theory
    FSDT
    A357 alloy
    Hamilton’s principle
    A357/DPS-SiC
    composites
    metoda elementów skończonych
    teoria odkształceń
    stop A357
    zasada Hamiltona
    kompozyty
    Opis:
    In this work, the free vibration behaviour of A357 composite plate reinforced with dual particle size (DPS) (3 wt.% coarse + 3 wt.% fine, 4 wt.% coarse + 2 wt.% fine, and 2 wt.% coarse + 4 wt.% fine) SiC is evaluated using the finite element method. To this end, first-order shear deformation theory (FSDT) has been used. The equations of motion have been derived using Hamilton’s principle and the solution has been obtained through condensation technique. A thorough parametric study was conducted to understand the effect of reinforcement size and weight fraction, boundary conditions, aspect ratio and length-to-width ratio of plate geometry on natural frequencies of A357/DPS-SiC composite plates. Results reveal significant influence of all the above variables on natural frequency of the composite plates. In all the cases, A357 composite plate reinforced with 4 wt.% coarse and 2 wt.% fine SiC particles displayed the highest natural frequency owing to its higher elastic and rigidity modulus. Further, the natural frequencies increase with decrease in aspect ratio of the plate geometry. Natural frequency also decreases with increase in the number of free edges. Lastly, increasing the length-to-width ratio drastically improves the natural frequency of the plates.
    Źródło:
    Archives of Foundry Engineering; 2021, 21, 1; 101-112
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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