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    Tytuł:
    A study on vibration of tapered non-homogeneous rectangular plate with structural parameters
    Autorzy:
    Kaur, N.
    Singhal, A.
    Khanna, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/265369.pdf
    Data publikacji:
    2018
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    wibracje
    niejednorodność
    gradient termiczny
    parametr stożka
    vibration
    non-homogeneity
    thermal gradient
    taper parameter
    simply supported
    aspect ratio
    Opis:
    Effects of structural parameters on the vibration of a tapered non-homogeneous rectangular plate with different combinations of boundary conditions are discussed. Tapering in the plate is assumed to be sinusoidal in the x-direction. Here, temperature variation and non-homogeneity in the plate material are also considered sinusoidal in the x-direction. The Rayleigh-Ritz method is used to calculate the frequency parameter for the first two modes of vibration for different values of the structural parameters, i.e. the taper parameter, thermal gradient, aspect ratio and non-homogeneity constant. Results are obtained for three boundary conditions, i.e. clamped boundary (C-C-C-C), simply supported boundary (SS-SS-SS-SS) and clamped-simply supported boundary (CSS-C-SS). Numerical values of the frequency parameter are given in a compact tabular form.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2018, 23, 4; 873-884
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Memory response on generalized thermoelastic medium in context of dual phase lag thermoelasticity with non-local effect
    Autorzy:
    Tiwari, R.
    Saeed, A. M.
    Kumar, R.
    Kumar, A.
    Singhal, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/38694222.pdf
    Data publikacji:
    2022
    Wydawca:
    Instytut Podstawowych Problemów Techniki PAN
    Tematy:
    memory dependent derivative
    time-delay
    kernel function
    non-local
    continuum theory
    dual phase lags
    Opis:
    Theory of non-local continuum is contemporary appraised and is found to be supplementary coherent to capture the impacts of each and every point of the material at its single point. The conviction of memory dependent derivative is also newly appraised and is observed to be more intuitionistic for predicting the realistic character of the real-world obstacles. Attractiveness of the belief of a memory dependent derivative lies in its unique properties such as its significant constituents – a kernel function and time-delay are freely selected according to the requirement of a problem. The present study comprises a new meticulous thermoelastic heat conduction model for the homogeneous, isotropic, thermoelastic half space medium concerning memory effects and non-local effects. Governing equations are constructed on the basis of the newly appraised non-local generalized theory of thermoelasticity with two phase lags in the frame of a memory dependent derivative. Exact analytical solutions of the physical fields such as dimensionless temperature, displacement as well as thermal stress are evaluated by using a suitable technique of the Laplace transform. Quantitative results are determined in a time-domain for different values of time by taking the numerical inversion of the Laplace transform. Noteworthy role of the constituents of the memory dependent derivative such as kernel function as well as time-delay factor has been scrutinized on the crucial field variables of the medium through computational outcomes. Moreover, the impact of non-local parameter is examined on the variations of field quantities through the quantitative results.
    Źródło:
    Archives of Mechanics; 2022, 74, 2-3; 69-88
    0373-2029
    Pojawia się w:
    Archives of Mechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wetting transparency of graphene deposited on copper in contact with liquid tin
    Autorzy:
    Sobczak, N.
    Sobczak, J. J.
    Kudyba, A.
    Homa, M.
    Bruzda, G.
    Grobelny, M.
    Kalisz, M.
    Strobl, K.
    Singhal, R.
    Monville, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/391530.pdf
    Data publikacji:
    2014
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Odlewnictwa
    Tematy:
    graphene
    liquid tin
    sessile drop
    wetting transparency
    liquophilic
    liquophobic
    Opis:
    Wetting behavior of liquid Sn (99.99%) on graphenecoated Cu substrate was investigated by the sessile drop method using two testing procedures: 1) classical contact heating (CH) of a couple of materials; 2) capillary purification (CP) allowing non-contact heating accompanied with squeezing the Sn droplet through a hole in an alumina capillary. The tests were performed in vacuum (p < 1.80 × 10-6 mbar) at 360 °C for 300 s. The images of Sn/substrate couples were recorded by high-resolution high-speed CCD camera. The results of this study evidenced that graphene layer is transparent for liquid Sn and after 300 s interaction, it forms the contact angles (θ) similar to those on pure Cu substrates, both in CH (θ = 59°) and CP (θ = 32°) tests. However, with liquid Sn, apparently the same effect of graphene wetting transparency is more complicated than that with water and it is caused by different mechanism, most probably, accompanied with reconstruction of the graphene layer.
    Źródło:
    Prace Instytutu Odlewnictwa; 2014, T. 54, nr 3, 3; 3-11
    1899-2439
    Pojawia się w:
    Prace Instytutu Odlewnictwa
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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