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RISS 인기검색어
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- 저자 : Salem Mohammed Aldosari (검색결과 2 건)
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Fatima Bounouara,Salem Mohammed Aldosari,Abdelbaki Chikh,Abdelhakim Kaci,Abdelmoumen Anis Bousahla,Fouad Bourada,Abdelouahed Tounsi,Kouider Halim Benrahou,Hind Albalawi,AbdeldjebbarTounsi 국제구조공학회 2023 Steel and Composite Structures, An International J Vol.46 No.3
In this investigation, an improved integral trigonometric shear deformation theory is employed to examine the vibrational behavior of the functionally graded (FG) sandwich plates resting on visco-Pasternak foundations. The studied structure is modelled with only four unknowns’ variables displacements functions. The simplicity of the developed model being in the reduced number of variables which was made with the help of the use of the indeterminate integral in the formulation. The current kinematic takes into consideration the shear deformation effect and does not require any shear correction factors as used in the first shear deformation theory. The equations of motion are determined from Hamilton’s principle with including the effect of the reaction of the visco-Pasternak’s foundation. A Galerkin technique is proposed to solve the differentials governing equations, which enables one to obtain the semi-analytical solutions of natural frequencies for various clamped and simply supported FG sandwich plates resting on visco-Pasternak foundations. The validity of proposed model is checked with others solutions found in the literature. Parametric studies are performed to illustrate the impact of various parameters as plate dimension, layer thickness ratio, inhomogeneity index, damping coefficient, vibrational mode and elastic foundation on the vibrational behavior of the FG sandwich plates.
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Study on stability and free vibration behavior of porous FGM beams
Riadh Bennai,Redhwane Ait Atmane,Fabrice Bernard,Mokhtar Nebab,Noureddine Mahmoudi,Hassen Ait Atmane,Salem Mohammed Aldosari,Abdelouahed Tounsi 국제구조공학회 2022 Steel and Composite Structures, An International J Vol.45 No.1
In this paper, buckling and free vibration of imperfect, functionally graded beams, including porosities, are investigated, using a higher order shear strain theory. Due to defects during the manufacturing process, micro porosities may appear in the material, hence the appearance of this imperfection in the structure. The material properties of the beams are assumed to vary regularly, with power and sigmoid law, in the direction of thickness. A novel porosity distribution affecting the functionally graded volume fraction is presented. For the compact formulation used for cementite-based materials and already used in P-FGM, we have adapted it for the distribution of S-FGM. The equations of motion in the FG beam are derived using Hamilton's principle. The boundary conditions for beam FG are assumed to be simply supported. Navier's solution is used to obtain the closed form solutions of the FG beam. The numerical results of this work are compared with those of other published research to verify accuracy and reliability. The comparisons of different shear shape functions, the influence of porosity, thickness and inhomogeneity parameters on buckling and free vibration of the FG beam are all discussed. It is established that the present work is more precise than certain theories developed previously.
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