Free vibration analysis of sandwich beams with auxetic core and CNT-reinforced nanocomposite face sheets using GDQ method
Publish place: 30th Annual International Conference of the Iranian Association of Mechanical Engineers
Publish Year: 1401
نوع سند: مقاله کنفرانسی
زبان: English
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شناسه ملی سند علمی:
ISME30_430
تاریخ نمایه سازی: 29 خرداد 1401
Abstract:
In the present paper, free vibration behavior of a sandwich beam consisting of an aluminum auxetic core and two polymer nanocomposite face sheets reinforced with Carbon Nanotube (CNT). The effective material properties of the face sheets and core are estimated using the extended rule of mixture and relations of the auxetic materials, respectively. Thereafter, the governing differential equations are derived based on the incorporation of first-order shear deformation theory (FSDT) and Hamilton’s principle. To obtain the natural frequencies of the structure, the differential equations are solved by implementing the Generalized Differential Quadrature method (GDQ) which is a well-known numerical strategy. Also, the results are compared and validated with a reputed work in literature and a perfect agreement is achieved. Finally, the influences of various parameters such as length-to-thickness ratio, the cell inclined angle, CNT’s volume fraction, various boundary conditions and core-to-face sheet ratio on the first natural frequency of the sandwich beam were investigated.
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Authors
Vahid Zamani
Department of Mechanical Engineering, Tarbiat Modares University, Tehran, Iran
Mostafa Nouraei
Department of Mechanical Engineering, Tarbiat Modares University, Tehran, Iran
Akbar Alibeigloo
Department of Mechanical Engineering, Tarbiat Modares University, Tehran, Iran