Stability of a Tapered, Pretwisted, and Rotating Sandwich Beam under Temperature Gradient

Dubey, A.; Nayak, C. R.; Nayak, Dipesh Kumar; Dash, P. R.

doi:10.1061/(asce)as.1943-5525.0001178

Cited by 8 publications

(2 citation statements)

References 29 publications

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“…It is widely accepted that for high aspect ratio structures, the dynamics of the structure can be modelled, using a beam theory, and, hence, many researchers considered the vibration of rotating beams by considering the effects of rotating speed, blade pre-twist, blade taper, material, etc. (Carnegie, 1959; Dubey et al, 2020; Han et al, 2020; Li et al, 2014; Swaminathan and Rao, 1977). Bossak and Zienkiewicz (1973) studied the effect of centrifugal forces on the free vibration of rotating structures.…”

Section: Introductionmentioning

confidence: 99%

“…Rafiee et al (2017) presented an extensive literature review on the vibration of rotating blades. More recently, Dubey et al (2020) investigated the stability of rotating sandwich blades with the effects of pre-twist, taper and temperature gradient. They highlighted that the angular speed and pre-twist of the blade change the dynamic stability of the beam.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Vibration analysis of rotating porous functionally graded material beams using exact formulation

Amoozgar

Gelman

2021

Journal of Vibration and Control

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In this article, the exact free vibration of porous functionally graded rotating blades is investigated. The nonlinear 3D dynamics of the blade is simulated using the geometrically exact fully intrinsic beam equations, and the corresponding cross-sectional properties of the FG beam are developed. The material properties of the functionally graded material blade are graded through the thickness using a power law distribution. Furthermore, it is assumed that due to the manufacturing process, a level of porosity exists in the material which in turn can affect the material properties of the blade. Two porosity models resembling the even and uneven distributions of porosity are considered. First, the obtained results for a functionally graded material rotating blade are compared with those reported in the literature, and a very good agreement is observed. Furthermore, the effect of various parameters on the vibration of the functionally graded material beam is investigated. It is obtained that the dynamics of the rotating blade is sensitive to the type of the porosity due to manufacturing flaws. Moreover, the numerical results show that the blade length to height ratio, power law index, rotating speed and porosity distribution model affect the dynamics of the beam significantly.

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