Papers by Abdelouahed Tounsi
International Journal of …, 2010
In this paper, the problem of interfacial stresses in RC beams strengthened with bonded composite... more In this paper, the problem of interfacial stresses in RC beams strengthened with bonded composite laminates is analyzed using linear elastic theory. It explicitly considers the interface slip effect on the structural performance by including both the effect of the adherend shear deformations and the timedependent deformations (such as shrinkage and creep). This new method needs only one differential equation to determine both shear and normal interfacial stress whereas the others solutions need two differential equations. Closed-form solutions are derived for plated RC beams simply supported at both ends and verified through direct comparisons with existing results. A parametrical study is carried out to show the effects of some design variables, e.g., thickness of adhesive layer and FRP plate.
Journal of Materials Science, 2008
The thermoelastic bending analysis of functionally graded ceramic–metal sandwich plates is studie... more The thermoelastic bending analysis of functionally graded ceramic–metal sandwich plates is studied. The governing equations of equilibrium are solved for a functionally graded sandwich plates under the effect of thermal loads. The sandwich plate faces are assumed to have isotropic, two-constituent material distribution through the thickness, and the modulus of elasticity, Poisson’s ratio of the faces, and thermal expansion coefficients are assumed to vary according to a power law distribution in terms of the volume fractions of the constituents. The core layer is still homogeneous and made of an isotropic ceramic material. Several kinds of sandwich plates are used taking into account the symmetry of the plate and the thickness of each layer. Field equations for functionally graded sandwich plates whose deformations are governed by either the shear deformation theories or the classical theory are derived. Displacement functions that identically satisfy boundary conditions are used to...
A new nonlocal hyperbolic shear deformation theory for nanobeams embedded in an elastic medium
Structural Engineering and Mechanics, 2015
A simple shear deformation theory based on neutral surface position for functionally graded plates resting on Pasternak elastic foundations
Structural Engineering and Mechanics, 2015
A novel four variable refined plate theory for laminated composite plates
Steel and Composite Structures, 2016
Thermomechanical bending response of FGM thick plates resting on Winkler-Pasternak elastic foundations
Steel & Composite structures, 2013
A novel four variable refined plate theory for bending, buckling, and vibration of functionally graded plates
Steel and Composite Structures, 2016
Bending and buckling analyses of functionally graded material (FGM) size-dependent nanoscale beams including the thickness stretching effect
Steel and Composite Structures, 2015
A simple shear deformation theory for thermo-mechanical behaviour of functionally graded sandwich plates on elastic foundations
Journal of Sandwich Structures and Materials, 2014
ABSTRACT This paper deals with the thermo-mechanical deformation behaviour of shear deformable fu... more ABSTRACT This paper deals with the thermo-mechanical deformation behaviour of shear deformable functionally graded sandwich plates resting on a two-parameter (Pasternak model) elastic foundation. By dividing the transverse displacement into bending and shear parts, the number of unknowns and governing equations of the present theory is reduced, and hence, makes it simple to use. The presented theory is variationally consistent, does not require shear correction factor and gives rise to transverse shear stress variation such that the transverse shear stresses vary in hyperbolic manner across the thickness satisfying shear stress-free surface conditions. A power-law distribution for the mechanical characteristics is adopted to model the continuous variation of properties from those of one component to those of the other. The sandwich plate faces are made of isotropic, two-constituent (ceramic-metal) material distribution through the thickness. The core layer is still homogeneous and made of an isotropic metal material. Several kinds of non-symmetric sandwich plates are presented. The governing equations and boundary conditions are derived using the principle of virtual displacements. Numerical results of the present simple shear deformation theory are presented to show the effect of material distribution and foundation parameters on the deflections and stresses. A wide variety of results is presented for the static response of sandwich plates under thermo-mechanical loads.
An efficient shear deformation theory for wave propagation of functionally graded material plates
Structural Engineering and Mechanics, 2016
A computational shear displacement model for vibrational analysis of functionally graded beams with porosities
Steel and Composite Structures, 2015
A new first shear deformation beam theory based on neutral surface position for functionally graded beams
Steel and Composite Structures, 2013
Comparison of various refined nonlocal beam theories for bending, vibration and buckling analysis of nanobeams
Structural Engineering and Mechanics, 2013
ABSTRACT
On thermal stability of plates with functionally graded coefficient of thermal expansion
Structural Engineering and Mechanics, 2016
Thermo-mechanical bending response with stretching effect of functionally graded sandwich plates using a novel shear deformation theory
Steel and Composite Structures, 2013
Nonlocal effects on thermal buckling properties of double-walled carbon nanotubes
Advances in nano research, 2013
ABSTRACT The thermal buckling properties of double-walled carbon nanotubes (DWCNTs) are studied u... more ABSTRACT The thermal buckling properties of double-walled carbon nanotubes (DWCNTs) are studied using nonlocal Timoshenko beam model, including the effects of transverse shear deformation and rotary inertia. The DWCNTs are considered as two nanotube shells coupled through the van der Waals interaction between them. The geometric nonlinearity is taken into account, which arises from the mid-plane stretching. Considering the small-scale effects, the governing equilibrium equations are derived and the critical buckling temperatures under uniform temperature rise are obtained. The results show that the critical buckling temperature can be overestimated by the local beam model if the nonlocal effect is overlooked for long nanotubes. In addition, the effect of shear deformation and rotary inertia on the buckling temperature is more obvious for the higher-order modes. The investigation of the thermal buckling properties of DWCNTs may be used as a useful reference for the application and the design of nanostructures in which DWCNTs act as basic elements.
Nonlinear cylindrical bending analysis of E-FGM plates with variable thickness
Steel and Composite Structures, 2014
Effect of tapered-end shape of FRP sheets on stress concentration in strengthened beams
Steel & Composite structures, 2011
Mathematical solution for free vibration of sigmoid functionally graded beams with varying cross-section
Steel & Composite structures, 2011
ABSTRACT
Nonlinear cylindrical bending of functionally graded carbon nanotube-reinforced composite plates
Steel & Composite structures, 2012
Uploads
Papers by Abdelouahed Tounsi