پديدآورندگان :
Shafaatian SM s.mehdi.shafaatian@gmail.com PhD student, Department of Mechanical Engineering, Yazd University, Yazd, Iran , Mahzoon M Professor, Department of Mechanical Engineering, Shiraz University, Shiraz, Iran , Zolanvar SH PhD student, Department of Mechanical Engineering, University of Tehran, Tehran, Iran , Zandi A. MSc student, Department of Mechanical Engineering, Shiraz University, Shiraz, Iran
كليدواژه :
Double , Walled Boron Nitride Nanotubes , Thermo–Mechanical Vibration , Critical Flow Velocity , Nonlocal Elasticity Theory
چكيده فارسي :
A nonlocal thermo–elastic Bernoulli–Euler beam model is developed for thermo–mechanical vibration and buckling instability of a double-walled boron nitride nanotube (DWBNNT) conveying fluid and resting on a viscoelastic medium. Finite element method is adapted to obtain numerical solutions. The effects of temperature change, nonlocal parameter and viscoelastic medium constants on the natural frequency and buckling instability of the nanotube are investigated for different boundary conditions. Numerical results indicate that as the temperature change increases the natural frequency and critical flow velocity decreases. Nonlocal parameter also has similar effect on natural frequency and critical flow velocity however at some points the behavior changes. Also taken into account are the effects of viscoelastic medium s constants.
