کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1809330 1525190 2015 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Electro-thermal vibration of a smart coupled nanobeam system with an internal flow based on nonlocal elasticity theory
ترجمه فارسی عنوان
ارتعاش الکتریکی حرارتی یک سیستم نانوحامل هوشمند همراه با جریان داخلی مبتنی بر نظریه الاستیک غیرخودی
کلمات کلیدی
نانولوله های انتقال سیالات، سیستم همپوشانی، کنترل هوشمند لرزش، پارامتر مقیاس کوچک، جریان سیالات
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک ماده چگال
چکیده انگلیسی

In this study, nonlinear vibration and stability of a fluid-conveying nanotube (FCNT), elastically coupled to a smart piezoelectric polymeric beam (PPB) is investigated based on nonlocal elasticity theory, Euler–Bernoulli beam model and energy approach. In order to obtain an active instability control of FCNT, the PPB is longitudinally polarized as an actuator while in the absence of an imposed electric field it is also possible to be used as an alarm biosensor. Simulating the above smart coupled nanobeam system alike the double nanobeam systems (which are relatively developed by other authors) leads to obtain nonlinear differential equations of motion. The linear natural and damping frequencies are achieved by ignoring all the system nonlinearities which are then considered to obtain nonlinear frequencies using an iterative method. The effects of geometric nonlinearity, small scale parameter, coupled medium constants, Knudsen number, temperature change, aspect ratio and external applied voltage on critical flow velocity are studied in details. It is concluded that applying an electric voltage on PPB will increase the stability of FCNT. It is hoped that this research will provide a new approach to smart instability control of FCNTs which is no yet reported.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica B: Condensed Matter - Volume 456, 1 January 2015, Pages 375–382
نویسندگان
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