Free vibration analysisof soft-core composite-faced sandwich plates using three-dimensional finite element method

Journal of Structural Engineering and Geo-Techniques

مقاله 5، دوره 5، شماره 3، آبان 2015، صفحه 27-31   

نویسندگان

Mohammad Mahdi Kheirikhah¹؛ Hasan Aghabarati²؛ Pooneh Khosravi³

¹Faculty of Industrial and Mechanical Engineering, Qazvin Branch, Islamic Azad University, Qazvin, Iran

²Department of Civil and Architectural Engineering, Qazvin Branch Islamic Azad University, Qazvin, Iran

³Faculty of Engineering, Kowsar educational Institute, Qazvin, Iran

چکیده

In this paper, natural frequencies of the sandwich plates with soft flexible core and composite face sheets are obtained. Three-Dimensional (3D) finite element method (FEM) is used for constructing and analyzing of the sandwich plates to obtain their natural frequencies. Continuity conditions for transverse shear stresses at the interfaces as well as transverse flexibility and transverse normal strain and stress of the core are considered.The effects of plate dimensions such as aspect ratio and thickness ratio are studied. Also, different boundary conditions such as all edges clamped (CCCC), all edges simply supported (SSSS) and combined boundary conditions including (CFCF)are applied to the sandwich plates. Comparison of the present results in special case with those of the accurate plate theories confirms the accuracy of the proposedmodel.

کلیدواژه‌ها

Finite Element Method؛ Free vibration analysis؛ Sandwich Plate؛ Composite Face Sheets؛ Flexible Core