Influence of Temperature Change on Modal Analysis of Rotary Functionally Graded Nano-beam in Thermal Environment
محورهای موضوعی : Engineering
E Shahabinejad
1
(Faculty of Engineering, Department of Mechanics, Imam Khomeini International University, Qazvin, Iran)
N Shafiei
2
(Faculty of Engineering, Department of Mechanics, Imam Khomeini International University, Qazvin, Iran)
M Ghadiri
3
(Faculty of Engineering, Department of Mechanics, Imam Khomeini International University, Qazvin,Iran)
کلید واژه: FG Nano-beam, Rotating Euler-Bernoulli beam, Eringen elasticity theory, GDQM, Thermal vibration,
چکیده مقاله :
The free vibration analysis of rotating functionally graded (FG) nano-beams under an in-plane thermal loading is provided for the first time in this paper. The formulation used is based on Euler-Bernoulli beam theory through Hamilton’s principle and the small scale effect has been formulated using the Eringen elasticity theory. Then, they are solved by a generalized differential quadrature method (GDQM). It is supposed that, according to the power-law form (P-FGM), the thermal distribution is non-linear and material properties are dependent to temperature and are changing continuously through the thickness. Free vibration frequencies are obtained for two types of boundary conditions; cantilever and propped cantilever. The novelty of this work is related to vibration analysis of rotating FG nano-beam under different distributions of temperature with different boundary conditions using nonlocal Euler-Bernoulli beam theory. Presented theoretical results are validated by comparing the obtained results with literature. Numerical results are presented in both cantilever and propped cantilever nano-beams and the influences of the thermal, nonlocal small-scale, angular velocity, hub radius, FG index and higher modes number on the natural frequencies of the FG nano-beams are investigated in detail.
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