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    Wyświetlanie 1-8 z 8
    Tytuł:
    A method for comparison of large deflection in beams
    Autorzy:
    Taghipour, Yasser
    Darfarin, Sara
    Powiązania:
    https://bibliotekanauki.pl/articles/27312406.pdf
    Data publikacji:
    2022
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    metoda porównawcza
    belka
    odkształcenie
    ugięcie belki
    comparison method
    beam
    large deflection
    displacement functions
    strain
    Opis:
    The deflection analysis of beams has been recently an active area of research. The large deflection of beams refers to deflections occurring due to large displacements and small strains. This type of deflection has been one of the areas of interest in the development of beam deformation methods. The wide diversity of beam deformation methods highlights the importance of their comparison to further elucidate the properties and features of each method and determine their benefits and limitations. In this study, a new comparison model is introduced which involves three steps, instead of only comparing final results for verification in common studies. In the first step, a complete comparison is made based on the assumptions and approximations of each method of the kinematics of deformation, displacement, and strain fields. After selecting the most accurate method in the first step, the displacement functions are determined by polynomial approximation under different loading and support conditions based on the selected method. In the third step, the displacement functions are used to calculate the strains in each method. The conclusion is based on comparing the strains. This comparative model can be used as a benchmark to compare different theories of deformation analysis.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2022, 27, 4; 179--193
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Reduced equations of slope-deflection method in structural analysis
    Autorzy:
    Husain, Muhammed Abbas
    Hasan, Zahraa Hameed
    Powiązania:
    https://bibliotekanauki.pl/articles/2106462.pdf
    Data publikacji:
    2021
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    analiza strukturalna
    konstrukcja słupowo-belkowa
    podpora mostu
    indeterminate structures
    slope-deflection
    structural analysis
    classical methods
    reduced equations
    Opis:
    This paper presents an update of the slope-deflection method, which is used in the analysis of statically indeterminate structures. In this study, new reduced equations are presented based on including both the effects of the member rotations and the fixed end moments in one term, rather than two terms, in order to simplify the application of the slope-deflection method. The reduced equations are developed, then three numerical examples with comprehensive cases of beams are solved by applying both the original and the proposed reduced equations. The analysis outputs indicated that the reduced equations are applicable for all cases that can be analyzed by the slope-deflection method, and give identical results compared with the original equations. It is found that the reduced equations require less computations when the structure has no support settlement, compared with the original equations, whereas the computations are approximately similar when the structure has a support settlement.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2021, 26, 4; 51--62
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of deflection in visco-thermoelastic beam resonators subjected to harmonic loading
    Autorzy:
    Chopra, Deepti
    Singh, Prince
    Powiązania:
    https://bibliotekanauki.pl/articles/2174186.pdf
    Data publikacji:
    2022
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    termoelastyczność
    transformata Laplace'a
    belka
    obciążenie
    visco-thermoelastic
    beam
    loading
    Laplace transform
    Opis:
    This paper analyses the transverse deflection in a homogeneous, isotropic, visco-thermoelastic beam when subjected to harmonic load. The ends of the beam are considered at different boundary conditions (both axial ends clamped, both axial ends simply supported and left end clamped and right end free). The deflection has been studied by using the Laplace transform. Numerical computation of analytical expression of deflection obtained after Inverse Laplace transform has been done using MATLAB software. The graphical observations have been discussed under various boundary conditions for different values of time and length. The above work has applications in design of resonators.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2022, 27, 2; 35--52
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Vertical extension of a multi-storey reinforced concrete building
    Autorzy:
    Bahrami, A.
    Deniz, S.
    Moalin, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/2174183.pdf
    Data publikacji:
    2022
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    konstrukcja żelbetowa
    ugięcie
    budynek żelbetowy
    vertical extension
    reinforced concrete building
    utilisation ratio
    reaction force
    deflection
    Opis:
    The global population is increasing annually; thus, there is a need for more housing and buildings worldwide. As cities grow outward and buildable lands become scarce, it is necessary to increase the height of existing buildings in cities, especially where the height of the buildings is low. For crowded cities, the storey extension is an increasingly popular measure that can meet market demand for centrally located houses. This paper examines the possibility of the vertical extension of an existing (reference) reinforced concrete building in Gävle in Sweden. The StruSoft FEM-Design program is employed to carry out the research. The building is firstly modelled, analysed, and designed completely. Thereafter, a storey extension is conducted vertically. The stresses and utilisation ratios of the load-bearing elements of the reference and extended buildings are assessed. It is found that some of the load-bearing elements of the building after the extension need strengthening. Different practical strengthening solutions are proposed. It is concluded that the building can successfully withstand the vertical extension after applying these proposed solutions. The maximum vertical reaction forces of the reference and extended buildings are obtained and compared. A comparison of the deflections of the buildings is made. The structural stability of the buildings is evaluated as well.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2022, 27, 1; 1--20
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Calculation method for plates with discrete variable thickness under uniform loading or hydrostatic pressure
    Autorzy:
    Aryassov, G.
    Gornostajev, D.
    Penkov, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/265148.pdf
    Data publikacji:
    2018
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    ciśnienie hydrostatyczne
    warunki brzegowe
    ugięcie
    plate calculation
    deflection
    hydrostatic pressure
    boundary conditions
    Opis:
    The article proposes a new analytical method for the calculation of plates with constant and variable rigidity parameters. This method renders it possible to decrease the weight of the plates working under hydrostatic pressure by using variable thicknesses. Firs, a short overview of existing calculation methods and their results are compared. It is shown that all existing methods depend on boundary conditions. Then is given the theory of the proposed calculation method is described and calculations for plates with constant and variable thickness worked under uniformly loaded forces and hydrostatic pressure are made. The results are compared to the FEM calculations and experimental results obtained by a tensile test machine and special equipment. Calculation results obtained by the proposed analytical method and FEM results are very close. Deviations are not more than 11%. Deviations between theoretical calculations and experimental results depend on loading type and design of the test specimens but maximum values are not more than 17%. The proposed calculation method does not depend on the boundary conditions and can be used for plate calculations. Especially for plates with difficult design and complex loading.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2018, 23, 4; 835-853
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Inelastic stability analysis of uniaxially compressed flat rectangular isotropic CCSS plate
    Autorzy:
    Ibearugbulem, O. M.
    Eziefula, U. G.
    Onwuka, D. O.
    Powiązania:
    https://bibliotekanauki.pl/articles/265658.pdf
    Data publikacji:
    2015
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    deflection function
    plastic buckling
    rectangular plate
    Taylor's series
    work principle
    płyta izotropowa
    wyboczenia
    metoda Taylora
    Opis:
    This study investigates the inelastic stability of a thin flat rectangular isotropic plate subjected to uniform uniaxial compressive loads using Taylor-Maclaurin series formulated deflection function. The plate has clamped and simply supported edges in both characteristic directions (CCSS boundary conditions). The governing equation is derived using a deformation plasticity theory and a work principle. Values of the plate buckling coefficient are calculated for aspect ratios from 0.1 to 2.0 at intervals of 0.1. The results compared favourably with the elastic stability values and the percentage differences ranged from -0.353% to -7.427%. Therefore, the theoretical approach proposed in this study is recommended for the inelastic stability analysis of thin flat rectangular isotropic plates under uniform in-plane compression.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2015, 20, 3; 637-645
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of time-fractional heat transfer and its thermal deflection in a circular plate by a moving heat source
    Autorzy:
    Thakare, S.
    Warbhe, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1839807.pdf
    Data publikacji:
    2020
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    naprężenie termiczne
    transformata
    przepływ ciepła
    fractional order
    circular plate
    integral transform
    Mittag-Leffler function
    thermal stresses
    Opis:
    Mathematical modeling of a thin circular plate has been made by considering a nonlocal Caputo type time fractional heat conduction equation of order […], by the action of a moving heat source. Physically convective heat exchange boundary conditions are applied at lower, upper and outer curved surface of the plate. Temperature distribution and thermal deflection has been investigated by a quasi-static approach in the context of fractional order heat conduction. The integral transformation technique is used to analyze the analytical solution to the problem. Numerical computation including the effect of the fractional order parameter has been done for temperature and deflection and illustrated graphically for an aluminum material.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2020, 25, 3; 158-168
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Application of fractional order theory of thermoelasticity in an elliptical disk and associated thermal stresses
    Autorzy:
    Thakare, S.
    Panke, Y.
    Hadke, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/1839826.pdf
    Data publikacji:
    2020
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    naprężenia termiczne
    pochodna Caputo
    termosprężystość
    elliptical disk
    fractional order theory
    Caputo derivative
    integral transform
    thermal stresses
    thermal deflection
    Opis:
    In this article, a time fractional-order theory of thermoelasticity is applied to an isotropic homogeneous elliptical disk. The lower and upper surfaces of the disk are maintained at zero temperature, whereas the sectional heat supply is applied on the outer curved surface. Thermal deflection and associated thermal stresses are obtained in terms of Mathieu function of the first kind of order 2n. Numerical evaluation is carried out for the temperature distribution, Thermal deflection and thermal stresses and results of the resulting quantities are depicted graphically.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2020, 25, 3; 169-180
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-8 z 8

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