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Hanoi, Vietnam

Hanoi Architectural University was established on September 17, 1969. The university belongs to Vietnam Ministry of Architecture . The school's predecessor is the Architecture Faculty of Hanoi University of Construction. The school is administered by Vietnam Ministry of Construction, under the management of the government in term of profession by Vietnam's Ministry of Education. Wikipedia.


Duc N.D.,Vietnam National University, Hanoi | Van Tung H.,Hanoi Architectural University
Computational Materials Science | Year: 2010

This report presents an analytical approach to investigate the stability of functionally graded cylindrical panels under axial compression. Equilibrium and compatibility equations for functionally graded panels are derived by using the classical shell theory taking into account both geometrical nonlinearity in von Karman-Donnell sense and initial geometrical imperfection. The resulting equations are solved by Galerkin procedure to obtain explicit expressions of buckling loads and postbuckling load-deflection curves. Stability analysis for a simply supported functionally graded cylindrical panel shows the effects of material and geometric parameters as well as imperfection on buckling and postbuckling behaviors of the panel. © 2009 Elsevier B.V. All rights reserved.


Tung H.V.,Hanoi Architectural University | Duc N.D.,Vietnam National University, Hanoi
Composite Structures | Year: 2010

This paper presents a simple analytical approach to investigate the stability of functionally graded plates under in-plane compressive, thermal and combined loads. Material properties are assumed to be temperature-independent, and graded in the thickness direction according to a simple power law distribution in terms of the volume fractions of constituents. Equilibrium and compatibility equations for functionally graded plates are derived by using the classical plate theory taking into account both geometrical nonlinearity in von Karman sense and initial geometrical imperfection. The resulting equations are solved by Galerkin procedure to obtain explicit expressions of postbuckling load-deflection curves. Stability analysis of a simply supported rectangular functionally graded plate shows the effects of the volume fraction index, plate geometry, in-plane boundary conditions, and imperfection on postbuckling behavior of the plate. © 2009 Elsevier Ltd. All rights reserved.


Tran T.N.,Hanoi Architectural University
International Journal for Numerical Methods in Engineering | Year: 2011

In this paper, the duality between the lower and the upper bound shakedown analyses of plate bending is presented. Based on the duality theory, the shakedown load multiplier formulated by static theorem is proved actually to be the dual form of the shakedown load multiplier formulated by kinematic theorem. A dual algorithm based upon the von Mises yield criterion and a non-linear optimization procedure is then developed to compute simultaneously both the upper and lower bounds of the plastic collapse limit and the shakedown limit. The DKQ plate bending element is used to discrete the problem field. Numerical examples are presented to show the excellent convergence and accuracy of solutions obtained by the present method. © 2011 John Wiley & Sons, Ltd.


Huy Bich D.,Vietnam National University, Hanoi | Van Tung H.,Hanoi Architectural University
International Journal of Non-Linear Mechanics | Year: 2011

This paper presents an analytical approach to investigate the non-linear axisymmetric response of functionally graded shallow spherical shells subjected to uniform external pressure incorporating the effects of temperature. Material properties are assumed to be temperature-independent, and graded in the thickness direction according to a simple power law distribution in terms of the volume fractions of constituents. Equilibrium and compatibility equations for shallow spherical shells are derived by using the classical shell theory and specialized for axisymmetric deformation with both geometrical non-linearity and initial geometrical imperfection are taken into consideration. One-term deflection mode is assumed and explicit expressions of buckling loads and loaddeflection curves are determined due to Galerkin method. Stability analysis for a clamped spherical shell shows the effects of material and geometric parameters, edge restraint and temperature conditions, and imperfection on the behavior of the shells. © 2011 Elsevier Ltd.


This paper presents an analytical approach to investigate the effects of tangential edge constraints on the buckling and postbuckling behavior of functionally graded flat and cylindrical panels subjected to thermal, mechanical and thermomechanical loads and resting on elastic foundations. Material properties are assumed to be temperature independent, and graded in the thickness direction according to a simple power law distribution in terms of the volume fractions of constituents. Governing equations are derived basing on the classical shell theory incorporating von Karman-Donnell type nonlinearity, initial geometrical imperfection and Pasternak type elastic foundations. Approximate solutions are assumed and Galerkin procedure are applied to obtain explicit expressions of buckling loads and load-deflection relations. The effects of in-plane edge restraint, elastic foundation, temperature and imperfection on the nonlinear response of the panels are graphically analyzed. © 2013 Elsevier Ltd.

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