توجه: محتویات این صفحه به صورت خودکار پردازش شده و مقاله‌های نویسندگانی با تشابه اسمی، همگی در بخش یکسان نمایش داده می‌شوند.
۱Vibration of Carbon Nanotube Reinforced Cylindrical Shell Based on Higher Order Shear Deformation Theory
نویسنده(ها): ، ،
اطلاعات انتشار: دومین کنفرانس بین المللی آکوستیک و ارتعاشات، سال
تعداد صفحات: ۷
This paper presents the free vibration of nano composite cylindrical shells reinforced by single –walled carbon nanotubes (SWCNTs) based on third order shear deformation theory. The material properties of uniformly distributed carbon nanotube – reinforced composites (UD– CNTRCs) are constant in the thick–ness direction and determined by the rule of mixture. the analysis is carried out with strain – displacement relations from love's shell theory. The Hamilton’s principle is employed to derive the governing equations and then solved by a wave propagation approach to obtain the vibration frequencies of UD– CNTRC cylin–drical shells. the influences of nanotube volume fraction, number of circumferential waves and the axial wave number on the natural frequencies of simply supported UD–CNTRC cylindrical shell are provided .Further , the case of clamped boundary condition is also studied and its results is compared with the case of simply supported boundary condition. The validity and accuracy of the present analysis are verified with available literature<\div>

۲Free vibration analysis of fiber reinforced cylindrical shells under various boundary conditions
نویسنده(ها): ، ،
اطلاعات انتشار: دومین کنفرانس بین المللی آکوستیک و ارتعاشات، سال
تعداد صفحات: ۸
This paper concerns the free vibrations of cylindrical shells consisting carbon fibers under various boundary conditions. The governing equations are based on higher order shear deformation theory and by employing the Hamilton’s principle. A micromechanical model is employed to define the me–chanical properties of composite cylinder shell. The results are evaluated by those reported in the lite–rature, then problem is solved numerically using the wave propagation approach method as an accu–rate, simple and computationally efficient numerical tool to obtain natural frequencies. Suitable dis–placement functions that identically satisfy the various boundary conditions are used to reduce the equilibrium equations to a set of coupled ordinary differential equations with variable coefficients, which can be solved by wave propagation approach method. In this work the case of uniformly distri–buted carbon fibers is assumed. Results for the fundamental linear frequencies are obtained for fiber reinforced cylindrical shell with T300 carbon fibers in polymer matrix. In addition the effect of fibers volume fractions and different boundary conditions are also examined.<\div>
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