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    Wyświetlanie 1-3 z 3
    Tytuł:
    The reflection and transmission of waves at interface between two nonlocal orthotropic thermoelastic halfspaces
    Autorzy:
    Tung, D. X.
    Powiązania:
    https://bibliotekanauki.pl/articles/38695697.pdf
    Data publikacji:
    2022
    Wydawca:
    Instytut Podstawowych Problemów Techniki PAN
    Tematy:
    inhomogeneous
    attenuation
    orthotropic
    nonlocal thermoelastic
    Opis:
    The present article deals with the propagation of inhomogeneous waves in an orthotropic medium based on Eringen’s nonlocal thermoelasticity. For chosen directions of propagation and a real finite inhomogeneity parameter, a complex slowness vector is specified to define the propagation of inhomogeneous incident wave. Then the reflection, transmission of plane waves at a plane interface between two nonlocal orthotropic thermoelastic halfspaces are discussed. In this incidence, horizontal slowness determines the slowness vectors for all reflected, transmitted waves. For each reflected, transmitted wave, the corresponding slowness vector is resolved to define its phase direction, phase velocity and attenuation angle. Appropriate boundary conditions on this wave-field determine the amplitude ratios for reflected, transmitted waves relative to the incident wave. The numerical examples are provided to show the effect of the inhomogeneity of incident wave, nonlocal parameter on the propagation characteristic of the reflected, transmitted waves.
    Źródło:
    Archives of Mechanics; 2022, 74, 5; 373-389
    0373-2029
    Pojawia się w:
    Archives of Mechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wave propagation in nonlocal orthotropic micropolar elastic solids
    Autorzy:
    Tung, D. X.
    Powiązania:
    https://bibliotekanauki.pl/articles/38626486.pdf
    Data publikacji:
    2021
    Wydawca:
    Instytut Podstawowych Problemów Techniki PAN
    Tematy:
    dispersion equation
    nonlocal micropolar
    local micropolar
    orthotropic
    Opis:
    The presented paper is concerned with the propagation of Rayleigh waves in an orthotropic nonlocal micropolar elastic half-space. The main aim of the paper is to derive dispersion equations of Rayleigh wave as well as Stroh formalism for the orthotropic nonlocal micropolar medium. Based on the obtained dispersion equation, the effect of material, nonlocality parameter on the Rayleigh wave propagation is considered through some numerical examples.
    Źródło:
    Archives of Mechanics; 2021, 73, 3; 237-251
    0373-2029
    Pojawia się w:
    Archives of Mechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Validation of the continuum orthotropic model of tensegrity beam-like and plate-like structures
    Autorzy:
    Obara, P.
    Tomasik, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/38697097.pdf
    Data publikacji:
    2023
    Wydawca:
    Instytut Podstawowych Problemów Techniki PAN
    Tematy:
    tensegrity
    double-layered grid
    self-stress
    infinitesimal mechanism
    continuum orthotropic model
    discrete model
    Opis:
    In this paper, an attempt was made to develop the continuum orthotropic model of tensegrity structures. A basic four-module tensegrity grid built from modified Quadruplex modules was proposed. A procedure called the energy equivalency method was adopted. The basis of this approach is the assumption that the finite element strain energy of a deformed tensegrity truss system contains the same energy as its continuum counterpart. Next, the six-parameter shell theory was used and closed forms for maximum displacements were obtained. Finally, in order to fill the gap in the existing literature, the continuum model was validated – the displacements were compared with displacements obtained from a discrete nonlinear model (the finite element method). The continuum model of tensegrity is a simple tool for analyzing large beam-like structures, plate-like structures and plate strips. It is important in case when discrete modeling becomes too tedious for the analysis. Another point is that many commercial software programs cannot analyze structures characterized by mechanisms. The finding of this work can also be useful for modeling metamaterials whose topology is based on the concept of tensegrity.
    Źródło:
    Archives of Mechanics; 2023, 75, 3; 249-269
    0373-2029
    Pojawia się w:
    Archives of Mechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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