The Experts below are selected from a list of 879 Experts worldwide ranked by ideXlab platform
Liangchi Zhang - One of the best experts on this subject based on the ideXlab platform.
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bending and local buckling of a nanocomposite beam reinforced by a single walled carbon nanotube
International Journal of Solids and Structures, 2006Co-Authors: T Vodenitcharova, Liangchi ZhangAbstract:This paper studies the pure bending and bending-induced local buckling of a nanocomposite beam reinforced by a single-walled carbon nanotube (SWNT). The Airy Stress-Function method was employed to analyse the deformation of the matrix, and the cross-sectional change of the SWNT in bending was taken into account. A particular consideration was given to the effect of the SWNTs radial flexibility on the strain/Stress states and buckling. It was found that in thicker matrix layers the SWNT buckles locally at smaller bending angles and greater flattening ratios. This causes higher strains/Stresses in the surrounding matrix and in turn degrades the strength of the nanocomposite structure. � 2005 Elsevier Ltd. All rights reserved.
Nguyen Dinh Duc - One of the best experts on this subject based on the ideXlab platform.
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nonlinear vibration of fgm moderately thick toroidal shell segment within the framework of reddy s third order shear deformation shell theory
International Journal of Mechanics and Materials in Design, 2020Co-Authors: Nguyen Dinh Duc, Pham Minh VuongAbstract:Nonlinear vibration and dynamic response of Functionally graded moderately thick toroidal shell segments resting on Pasternak type elastic foundation are investigated in this paper. Functionally graded materials are made from ceramic and metal, and the volume fraction of constituents are assumed to vary through the thickness direction according to a power law Function. Reddy’s third order shear deformation, von Karman nonlinearity, Airy Stress Function method and analytical solutions are used to derive the governing equations. Galerkin method is used to convert the governing equation into nonlinear differential equation, then the explicit expressions of natural frequencies and nonlinear frequency–amplitude relations are obtained. Using Runge–Kutta method, the nonlinear differential equation of motion is solved, and then nonlinear vibration and dynamic response of shells are analyzed. The effects of temperature, material and geometrical properties, and foundation parameters on nonlinear vibration and dynamic characteristics are investigated and discussed in detail.
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nonlinear dynamic response and vibration of Functionally graded carbon nanotube reinforced composite fg cntrc shear deformable plates with temperature dependent material properties and surrounded on elastic foundations
Journal of Thermal Stresses, 2017Co-Authors: Nguyen Van Thanh, Nguyen Dinh Khoa, Ngo Duc Tuan, Phuong Tran, Nguyen Dinh DucAbstract:ABSTRACTBased on Reddy’s third-order shear deformation plate theory, the nonlinear dynamic response and vibration of imperfect Functionally graded carbon nanotube-reinforced composite (FG-CNTRC) plates on elastic foundations subjected to dynamic loads and temperature are presented. The plates are reinforced by single-walled carbon nanotubes which vary according to the linear Functions of the plate thickness. The plate’s effective material properties are assumed to depend on temperature and estimated through the rule of mixture. By applying the Airy Stress Function, Galerkin method and fourth-order Runge–Kutta method, nonlinear dynamic response and natural frequency for imperfect FG-CNTRC plates are determined. In numerical results, the influences of geometrical parameters, elastic foundations, initial imperfection, dynamic loads, temperature increment, and nanotube volume fraction on the nonlinear vibration of FG-CNTRC plates are investigated. The obtained results are validated by comparing with those of ...
T Vodenitcharova - One of the best experts on this subject based on the ideXlab platform.
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bending and local buckling of a nanocomposite beam reinforced by a single walled carbon nanotube
International Journal of Solids and Structures, 2006Co-Authors: T Vodenitcharova, Liangchi ZhangAbstract:This paper studies the pure bending and bending-induced local buckling of a nanocomposite beam reinforced by a single-walled carbon nanotube (SWNT). The Airy Stress-Function method was employed to analyse the deformation of the matrix, and the cross-sectional change of the SWNT in bending was taken into account. A particular consideration was given to the effect of the SWNTs radial flexibility on the strain/Stress states and buckling. It was found that in thicker matrix layers the SWNT buckles locally at smaller bending angles and greater flattening ratios. This causes higher strains/Stresses in the surrounding matrix and in turn degrades the strength of the nanocomposite structure. � 2005 Elsevier Ltd. All rights reserved.
Jaehoon Kang - One of the best experts on this subject based on the ideXlab platform.
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exact solutions of Stresses strains and displacements of a perforated rectangular plate by a central circular hole subjected to linearly varying in plane normal Stresses on two opposite edges
International Journal of Mechanical Sciences, 2014Co-Authors: Jaehoon KangAbstract:Abstract Exact solutions for Stresses, strains, and displacements of a perforated rectangular plate by a central circular hole subjected to linearly varying in-plane normal Stresses on two opposite edges are investigated by two-dimensional theory of elasticity using the Airy Stress Function. The hoop Stresses, strains, and displacements occurring at the edge of the circular hole are computed and plotted. Comparisons are made for the Stress concentration factors for several types of linearly varying in-plane loading.
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exact solutions for Stresses strains displacements and Stress concentration factors of a perforated rectangular plate by a circular hole subjected to in plane bending moment on two opposite edges
Journal of Engineering Mechanics-asce, 2014Co-Authors: Hayoung Woo, A W Leissa, Jaehoon KangAbstract:Exact solutions for Stresses, strains, displacements, and the Stress concentration factors of a perforated rectangular plate by a circular hole subjected to in-plane bending moment on two opposite edges are investigated by two-dimensional theory of elasticity using the Airy Stress Function. The hoop Stresses, strains, and displacements occurring at the edge of the circular hole are computed and plotted. Comparisons are made for the hoop Stresses and the Stress concentration factors from the current study and rectangular plates with a circular hole under uniaxial and biaxial uniform tensions and pure shear loading.
Chiara Bisagni - One of the best experts on this subject based on the ideXlab platform.
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single mode solution for post buckling analysis of composite panels with elastic restraints loaded in compression
Composites Part B-engineering, 2012Co-Authors: Riccardo Vescovini, Chiara BisagniAbstract:Abstract A closed-form solution is obtained to determine the buckling and post-buckling behavior of elastically restrained composite panels under compressive loading. The approach allows to study the response of stiffened panels undergoing local buckling modes, taking into account the restraints provided by the stiffeners to the rotation of the skin edges. The panels are modeled as thin plates referring to Marguerre type equations together with classical lamination theory. The equations are written in non-dimensional form, allowing for the study of a wide class of orthotropic laminates. The problem is formulated in terms of out of plane displacement, represented with a single-mode approximation, and Airy Stress Function. The compatibility equation is solved exactly, while the method of Galerkin is applied to impose the equilibrium. The buckling load, the out of plane displacement at different load levels, and the post-buckling stiffness are derived and compared with finite element analyses, revealing good accuracy. Sensitivity analyses are also performed obtaining design charts.