Author
K. S. Afaq
Bio: K. S. Afaq is an academic researcher from École nationale d'ingénieurs de Tarbes. The author has contributed to research in topics: Finite element method & Boundary value problem. The author has an hindex of 3, co-authored 6 publications receiving 670 citations.
Papers
More filters
TL;DR: In this paper, the authors presented a new multi-layer laminated composite structure model to predict the mechanical behavior of multi-layered composite structures from both a static and dynamic point of view.
597 citations
13 Feb 2009
TL;DR: In this article, a new multilayered laminated composite structure model is presented to predict the mechanical behavior of multilayer laminated composites. But the model is more precise than all other existing refined theories.
Abstract: This work presents a new multilayered laminated composite structure model to predict the mechanical behaviour of multilayered laminated composite structures. This new multilayered structure model describes the shear stress distribution model through the thickness respecting free boundary conditions on the top and bottom surfaces by an exponential function. This model has the same order of complexity as Touratier's model ‘Sine’, so a shear correction factor is not required like in the first-order shear deformation theory. This model is more precise than all other existing refined theories. This theory is based on the kinematic approach in which the shearing is represented by an exponential function. The virtual power principal is used to deduce the boundary value problem. To verify the precision of the present model, several significant problems on bending, vibration, and buckling of laminated and sandwich structures have been studied. The results by the present model are compared with the exact three-dime...
140 citations
TL;DR: In this article, the authors presented a new shear stress function in the form of the exponential function, to predict the mechanical behavior of multi-layered laminated composite structures, which is more precise than older ones as compared to the results obtained by the finite element analysis.
15 citations
TL;DR: In this article, a new shear stress function in the form of the exponential function is presented to predict the mechanical behavior of multi-layered laminated composite structures. But the model is not suitable for the analysis of multiplayer composite structures, and the results are more precise than older ones as compared to the results by the finite element analysis.
Abstract: One of the current problems connected with multiplayer composite structures concerns the analysis of the distribution of the stresses around peculiarities (free edge and loaded edge) and at the interfaces of each layer. This work presents a new shear stress function in the form of the exponential function, to predict the mechanical behaviour of multi-layered laminated composite structures. As a case study, the mechanical behaviour of laminated composite beam (90°/070°/90°) is examined. The results are compared with the model \"Sinus\" and 2D finite element method studied. Results show that this new model is more precise than older ones as compared to the results by the finite element analysis [Abaqus], To introduce continuity on the interfaces of each layer, the kinematics defined by Ossadzow is used with new exponential model. The equilibrium equations and natural boundary conditions are derived by the principle of virtual power.
1 citations
TL;DR: In this article, a new shear stress function in the form of the exponential function was presented to predict the mechanical behavior of multilayered laminated composite structures, and the results showed that this new model is more precise than older ones when compared with results obtained by finite element analysis.
Abstract: One of the current problems connected with multilayer composite structures concerns the analysis of the distribution of the stresses around peculiarities (free edge and loaded edge) and at the interfaces of each layer. This work presents a new shear stress function in the form of the exponential function to predict the mechanical behavior of multilayered laminated composite structures. As a case study, the mechanical behavior of a laminated composite beam (90 /0 /0 /90 ) is examined. The results are compared with the Touratier model sine and the two-dimensional finite element method studied. Results show that this new model is more precise than older ones when compared with results obtained by finite element analysis. To introduce continuity on the interfaces of each layer, the new exponential model is used with Ossadzow kinematics. The equilibrium equations and natural boundary conditions are derived from the principle of virtual power.
1 citations
Cited by
More filters
TL;DR: In this article, a hyperbolic shear deformation theory applicable to bending and free vibration analysis of isotropic, functionally graded, sandwich and laminated composite plates is presented.
451 citations
TL;DR: In this paper, a new higher-order deformable laminated composite plate theory is proposed, which is constructed from 3-D elasticity bending solutions by using an inverse method, and exactly satisfies stress boundary conditions on the top and the bottom of the plate.
450 citations
TL;DR: In this article, the free vibration of simply supported FG beam was investigated and the governing equations were found by applying Hamilton's principle, and different higher order shear deformation theories and classical beam theories were used in the analysis.
445 citations
TL;DR: In this article, a non-classical microbeam model incorporating the material length scale parameter was proposed to capture the size effect of the FG microbeams and the governing equations and the related boundary conditions were derived using Hamilton's principle.
424 citations
SIDI1
TL;DR: In this paper, a refined trigonometric shear deformation theory (RTSDT) is presented for the thermoelastic bending analysis of functionally graded sandwich plates, where the displacement components are expressed by trigonometrical series representation through the plate thickness to develop a two-dimensional theory and gives rise to transverse shear stress variation.
403 citations