Temat: FGM - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Free vibration analysis of FGM stepped nanostructures using nonlocal dynamic stiffness model
Autorzy:: Lien, Tran Van
Duc, Ngo Trong
Dinh, Tran Binh
Dat, Pham Tuan
Powiązania:: https://bibliotekanauki.pl/articles/2086972.pdf
Data publikacji:: 2022
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:: nonlocal
DSM
FGM
nanostructure
nondimensional frequency
Opis:: A nonlocal Dynamic Stiffness Model (DSM) for free vibration analysis of Functionally Graded Material (FGM) stepped nanostructures based on the Nonlocal Elastic Theory (NET) is proposed. An exact solution to the equation of motion of a nanobeam element according to the Timoshenko beam theory, NET, and taking into account position of the neutral axis is constructed. Nondimensional frequencies and mode shapes of complete FGM stepped nanostructures are easily obtained using the nonlocal DSM. Numerical results are presented to show significance of the material distribution profile, nonlocal effect, and boundary conditions on free vibration of nanostructures.
Źródło:: Journal of Theoretical and Applied Mechanics; 2022, 60, 2; 279--292
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Bending, buckling and free vibration of a beam with unsymmetrically varying mechanical properties
Autorzy:: Magnucki, K.
Lewiński, J.
Magnucka-Blandzi, E.
Kędzia, P.
Powiązania:: https://bibliotekanauki.pl/articles/279585.pdf
Data publikacji:: 2018
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:: FGM beam
mathematical modelling
numerical FEM calculations
Opis:: The subject of the paper is a beam with unsymmetrically varying mechanical properties in the depth direction. The nonlinear hypothesis of plane cross section deformation is assumed. Based on Hamilton’s principle, two differential equations of motion are obtained. The system of equations is analytically solved with a view to analyse the bending, buckling and free vibration problems of the beam. Moreover, the FEM model of the beam is developed and deflections, critical axial forces and natural frequencies of the beam are calculated. The results of these two methods are compared.
Źródło:: Journal of Theoretical and Applied Mechanics; 2018, 56, 4; 1163-1178
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: On axisymmetric heat conduction problem for multilayer graded coated half-space
Autorzy:: Perkowski, D. M.
Kulchytsky-Zhyhailo, R.
Kołodziejczyk, W.
Powiązania:: https://bibliotekanauki.pl/articles/281629.pdf
Data publikacji:: 2018
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:: temperature
heat flux
FGM
composite
homogenized model
Opis:: The technique of integral Hankel transform to find the solution of heat conduction in half-space coated by a multilayered package of homogenous laminae is applied. The half-space is heated by the given heat flux on the boundary surface. The temperature and heat flux distribution in the radial direction is analyzed for two types of coatings: 1) when the heat conductivity coefficient is described by a power or exponential function of the distance to the boundary surface; 2) multilayered coating has a periodic structure.
Źródło:: Journal of Theoretical and Applied Mechanics; 2018, 56, 1; 147-156
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Numerical creep analysis of FGM rotating disc with GDQ method
Autorzy:: Zharfi, H.
Toussi, H. E.
Powiązania:: https://bibliotekanauki.pl/articles/280599.pdf
Data publikacji:: 2017
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:: creep
FGM
GDQ method
rotating disc
boundary conditions
Opis:: Rotating discs are the vital part of many kinds of machineries. Usually, they are operating at relatively high angular velocity and temperature conditions. Accordingly, in practice, the creep analysis is an essential necessity in the study of rotating discs. In this paper, the time dependent creep analysis of a thin Functionally Graded Material (FGM) rotating disc investigated using the Generalized Differential Quadrature (GDQ) method. Creep is described with Sherby’s constitutive model. Secondary creep governing equations are derived and solved for a disc with two various boundary conditions and with linear distribution of SiC particles in pure Aluminum matrix. Since the creep rates are a function of stresses, time and temperature, there is not a closed form solution to these equations. Using a solution algorithm and the GDQ method, a solution procedure for these nonlinear equations is presented. Comparison of the results with other existing creep studies in literature reveals the robustness, precision and high efficiency beside rapid convergence of the present approach.
Źródło:: Journal of Theoretical and Applied Mechanics; 2017, 55, 1; 331-341
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Modelling of FGM plates
Autorzy:: Jemielita, G.
Kozyra, Z.
Powiązania:: https://bibliotekanauki.pl/articles/280423.pdf
Data publikacji:: 2018
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:: modelling
layer plate
FGM plate
stiffness of the plate
Opis:: The paper presents formulation of the problem of layered plates composed of two various isotropic materials. We assume that the first material M₁ is characterized by the following parameters: Young’s modulus E₁ and Poisson’s ratio ν₁, whereas the second one by E₂ and ν₂, respectively. Let us consider two modelling cases for functionally graded material (FGM) plates. These cases are related to an appropriate distribution of the material within two-layer and three-layer systems. Our objective is to compare the stiffness of both the two-layer and there-layer plates with the FGM plate containing various proportions between the material components M₁ and M₂.
Źródło:: Journal of Theoretical and Applied Mechanics; 2018, 56, 3; 829-839
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Some aspects of dynamic coupled response of functionally graded thin-walled columns with square cross-sections under in-plane pulse compression
Autorzy:: Kołakowski, Z.
Teter, A.
Powiązania:: https://bibliotekanauki.pl/articles/279439.pdf
Data publikacji:: 2016
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:: FGM
dynamic response
interactive buckling
thin-walled structures
compression
pulse load
Opis:: The present paper deals with a dynamic coupled response of functionally graded columns with a quadratic cross-section subjected to an in-plane pulse loading. An Al-TiC metal- -ceramic material is applied. It is assumed that functionally graded materials (FGMs) are subject to Hooke’s law. The thin-walled structures are simply supported at the ends. This study is devoted to the stability problem of rectangular dynamic pulse load. The effects of temperature, wave propagation and damping are neglected. In order to obtain the equations of motion of individual plates, the classic laminate plate theory (CLPT) has been modified in such a way that it additionally accounts for all components of inertial forces. A plate model is adopted for the structures. The problem of an interaction of the global mode with the local ones is concerned (i.e., a three-modes approach). Attention has been focused on some unexpected aspects related to dynamic interactive buckling of columns having two axes of the cross-section symmetry. In the present study, a new approach to the description of this phenomenon, based on Koiter’s theory, has been applied.
Źródło:: Journal of Theoretical and Applied Mechanics; 2016, 54, 2; 449-462
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Elastic solution of pressurized clamped-clamped thick cylindrical shells made of functionally graded materials
Autorzy:: Ghannad, M.
Nejad, M. Z.
Powiązania:: https://bibliotekanauki.pl/articles/949147.pdf
Data publikacji:: 2013
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:: clamped-clamped thick cylinder
functionally graded material (FGM)
shear deformation theory (SDT)
Opis:: The effect of material inhomogeneity on displacements and stresses of an internally pressurized clamped-clamped thick hollow cylinder made of functionally graded materials is investigated. The modulus of elasticity is graded along the radial direction according to power functions of the radial direction. It is assumed that Poisson’s ratio is constant across the cylinder thickness. The governing differential equations were generally derived, making use of the first-order shear deformation theory (FSDT). Following that, the set of non-homogenous linear differential equations for the cylinder with clamped-clamped ends was solved, and the effect of loading and supports on the stresses and displacements was investigated. The problem was also solved, using the finite element method (FEM), the results of which were compared with those of the analytical method.
Źródło:: Journal of Theoretical and Applied Mechanics; 2013, 51, 4; 1067-1079
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: An investigation of stresses and deformation states of clamped rotating functionally graded disks
Autorzy:: Thawait, A. K.
Sondhi, L.
Sanyal, S.
Bhowmick, S.
Powiązania:: https://bibliotekanauki.pl/articles/281806.pdf
Data publikacji:: 2017
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:: functionally graded material (FGM)
linear elastic analysis
annular rotating disk
variable thickness rotating disk
finite element method (FEM)
Opis:: The present study deals with the linear elastic analysis of variable thickness rotating disks made of functionally graded materials (FGMs) by the finite element method. The disks have radially varying material properties according to an exponential law, which is achieved by the element based grading of the material properties on the meshed domain. The results are reported for three types of thickness profiles, namely, uniform, linearly varying and concave thickness, having their mass constant. The disks are subjected to the clamped boundary condition at the inner surface and the free boundary condition at the outer surface. The obtained results show that in a variable thickness rotating disk, deformation and stresses are less as compared to the uniform thickness disk.
Źródło:: Journal of Theoretical and Applied Mechanics; 2017, 55, 1; 189-198
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Dostawca treści:: Biblioteka Nauki

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