Forced vibration of piezoelectric nanowires based on nonlocal elasticity theory

سال انتشار: 1395
محل انتشار: مجله مکانیک کاربردی محاسباتی، دوره: 47، شماره: 2
کد COI اختصاصی: JR_JCAM-47-2_002
زبان مقاله: انگلیسی
تعداد مشاهده: 550

دانلود فایل این مقاله

نویسندگان

Abdolhossein Fereidoon

Department of Mechanical Engineering, University ofSemnan, Semnan, Iran

Mehdi divsalar

Department of Mechanical Engineering, Islamic Azad University, Semnan Branch, Semnan, Iran

Naser Kordani

Department of Mechanical Engineering, College of Engineering, University of Mazandaran, Mazandaran, Iran

Ali Farajpour

Department of Mechanical Engineering, College of Engineering, University of Tehran, Tehran, Iran

چکیده

In this paper, a numerical solution procedure is presented for the free and forced vibration of a piezoelectric nanowire under thermo-electro-mechanical loads based on the nonlocal elasticity theory within the framework of Timoshenko beam theory. The influences of surface piezoelectricity, surface elasticity and residual surface stress are taken into consideration. Using Hamilton’s principle, the nonlocal governing differential equations are derived. The governing equations and the related boundary conditions are discretized by using the differential quadrature method (DQM). The numerical results are obtained for both free and forced vibration of piezoelectric nanowires. The present results are validated by available results in the literature. The effects of the nonlocal parameter together with the other parameters such as residual surface stress, temperature change and external electric voltage on the size-dependent forced vibration of the piezoelectric nanowires are studied. It is shown that the nonlocal effect (small scale effect) plays a prominent role in the forced vibration of piezoelectric nanowires and this effect cannot be neglected for small external characteristic lengths. The resonant frequency increases with increasing the residual surface stress. In addition, as the surface elastic constant increases, the resonant frequency of PNWs increases, while the surface piezoelectric constant has a decreasing effect on the resonant frequency

کلیدواژه ها

Piezoelectric nanowire, Forced vibration, Small scale effect, Surface effects

مقالات مرتبط جدید

اطلاعات بیشتر در مورد COI

COI مخفف عبارت CIVILICA Object Identifier به معنی شناسه سیویلیکا برای اسناد است. COI کدی است که مطابق محل انتشار، به مقالات کنفرانسها و ژورنالهای داخل کشور به هنگام نمایه سازی بر روی پایگاه استنادی سیویلیکا اختصاص می یابد.

کد COI به مفهوم کد ملی اسناد نمایه شده در سیویلیکا است و کدی یکتا و ثابت است و به همین دلیل همواره قابلیت استناد و پیگیری دارد.