Temat: micropolar theory - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Investigations of shear localization in granular bodies within an anisotropic micro-polar hypoplasticity
Autorzy:: Tejchman, J.
Powiązania:: https://bibliotekanauki.pl/articles/241368.pdf
Data publikacji:: 2005
Wydawca:: Polska Akademia Nauk. Instytut Budownictwa Wodnego PAN
Tematy:: bedding plane
granular materials
hypoplasticity
micropolar theory
shear zone
texturial anisotropy
Opis:: The paper focuses on the numerical analysis of the effect of texturial anisotropy on shear localization in cohesionless granular materials. For simulation of the mechanical behaviour of a granular material during a monotonous deformation path, a hypoplastic constitutive model was used. To take into account a characteristic length of micro-structure, the constitutive model was extended by micro-polar terms. To take into account texturial effects, the granular hardness was modified. The calculations were carried out with a sand specimen during plane strain compression under constant lateral pressure. A stochastic and uniform distribution of the initial void ratio in the granular specimen was assumed. In addition, shear localization for two different uniform initial void ratios was investigated.
Źródło:: Archives of Hydro-Engineering and Environmental Mechanics; 2005, 52, 4; 351-371
1231-3726
Pojawia się w:: Archives of Hydro-Engineering and Environmental Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Stress equations of motion of Ignaczak type for the second axisymmetric problem of micropolar elastodynamics
Autorzy:: Dyszlewicz, Janusz
Powiązania:: https://bibliotekanauki.pl/articles/1339178.pdf
Data publikacji:: 1997
Wydawca:: Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:: stress equations of motion problem (SEMP)
micropolar elasticity theory
Opis:: A second axially-symmetric initial-boundary value problem of linear homogeneous isotropic micropolar elastodynamics in which the displacement and rotation take the forms $\underline{u}=(0,u_θ,0)$, $\underline{φ}=(φ_r,0,φ_z)$ ((r,θ,z) are cylindrical coordinates; cf. [17]) is formulated in a pure stress language similar to that of [12]. In particular, it is shown how $\underline{u}$ and $\underline{φ}$ can be recovered from a solution of the associated pure stress initial-boundary value problem, and how a singular solution corresponding to harmonic vibrations of a concentrated body couple in an infinite space can be obtained from the solution of a pure stress problem.
Źródło:: Applicationes Mathematicae; 1996-1997, 24, 3; 251-265
1233-7234
Pojawia się w:: Applicationes Mathematicae
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Refined multi-phase-lags theory and Thomson effect on a micropolar thermoelastic medium with voids
Autorzy:: Alharbi, Amnah M.
Abd-Elaziz, Elsayed M.
Othman, Mohamed I.A.
Powiązania:: https://bibliotekanauki.pl/articles/1955005.pdf
Data publikacji:: 2021
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: micropolar
voids
refined-phase-lags theory
thomson effect
normal mode
analysis
Opis:: The problem considered is that of an isotropic, micropolar thermoelastic medium with voids subjected to the Thomson effect. The solution to the problem is presented in the context of the refined multiphase-lags theory of thermoelasticity. The normal mode analysis was used to obtain the analytical expressions of the considered variables. The nondimensional displacement, temperature, microrotation, the change in the volume fraction field and stress of the material are obtained and illustrated graphically. The variations of these quantities have been depicted graphically in the refined-phase-lag theory, Green and Naghdi theory of type II, Lord and Shulman theory and a coupled theory. The effects of the Thomson parameter and phase lag parameters on a homogeneous, isotropic, micropolar thermoelastic material with voids are revealed and discussed. Some particular cases of interest are deduced from the present investigation.
Źródło:: Archives of Thermodynamics; 2021, 42, 3; 279--309
1231-0956
2083-6023
Pojawia się w:: Archives of Thermodynamics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: The effect of reduced heat transfer in a micropolar fluid in natural convection
Autorzy:: Rup, K.
Dróżdż, A.
Powiązania:: https://bibliotekanauki.pl/articles/240722.pdf
Data publikacji:: 2013
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: micropolar fluid
microrotation
boundary layer theory
Local Nusselt number
teoria warstwy przyściennej
Liczba Nusselta
Opis:: This paper presents the numerical solution to the unsteady natural convection problem in micropolar fluid in the vicinity of a vertical plate, heat flux of which rises suddenly at a given moment. In order to solve this problem the method of finite differences was applied. The numerical results have been presented for a range of values of the dimensionless material properties and fluid Prandtl number. The analysis of the results shows that the intensity of the heat transfer in micropolar fluid is lower compared to the Newtonian fluid.
Źródło:: Archives of Thermodynamics; 2013, 34, 3; 45-59
1231-0956
2083-6023
Pojawia się w:: Archives of Thermodynamics
Dostawca treści:: Biblioteka Nauki

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