In this paper, a rotating beam made of metal/ceramic-based functionally graded materials (FGMs) is examined under free vibration. In the research reported in this paper, the states of both tapered and uniform beams with a constant angular velocity are taken into consideration, in which the FGM properties could change across the thickness. In the research reported in this paper, the fraction of changes in metal and ceramic components is modeled by a power function with symmetric structure. The discretized equations of motion of the system are obtained based on two theories of Euler–Bernoulli and Timoshenko beams, using finite elements with two different types of elements [(1) four-degree-of-freedom (DOF) model, and (2) eight-DOF model] for in-plane (lead-lag), out-of-plane (flapping), and flap-lag, to obtain the vibration properties and therefore the eigenfrequencies. In the sequel, the effect of various parameters on the eigenfrequencies, such as the volume fraction of two constituent phases, the angular velocity of rotating beam, hub radius, and taper ratios is reviewed and compared with the results of other studies.
Flap-Lag Vibration Analysis of Rotating Tapered Solid Beams with Functionally Graded Characteristics
Journal of Aerospace Engineering ; 29 , 1
2015-05-05
Article (Journal)
Electronic Resource
Unknown
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