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Dynamic instability of rotating doubly-tapered laminated composite beams under periodic rotational speeds


Dynamic instability of rotating doubly-tapered laminated composite beams under periodic rotational speeds

Seraj, Saemul and Ganesan, Rajamohan (2018) Dynamic instability of rotating doubly-tapered laminated composite beams under periodic rotational speeds. Composite Structures, 200 . pp. 711-728. ISSN 02638223 (In Press)

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Official URL: http://dx.doi.org/10.1016/j.compstruct.2018.05.133


Dynamic instability analysis of doubly-tapered cantilever composite beams rotating with periodic rotational velocity is conducted in the present work for out-of-plane bending (flap), in-plane bending (lag) and axial vibrations. Rayleigh-Ritz method and classical lamination theory are used along with an energy formulation. Bolotin’s method is applied to obtain the instability regions. To verify the dynamic instability analysis results, time responses are investigated at different locations of the instability region by using the Runge-Kutta method. A comprehensive parametric study is conducted in order to understand the effects of taper configurations and various system parameters including mean rotational velocity, hub radius, double-tapering angles and stacking sequences, on the dynamic instability characteristics of the composite beam. The composite material considered in the present work in numerical results is NCT-301 graphite-epoxy prepreg.

Divisions:Concordia University > Gina Cody School of Engineering and Computer Science > Mechanical, Industrial and Aerospace Engineering
Item Type:Article
Authors:Seraj, Saemul and Ganesan, Rajamohan
Journal or Publication:Composite Structures
  • Natural Sciences and Engineering Research Council (NSERC) of Canada
Digital Object Identifier (DOI):10.1016/j.compstruct.2018.05.133
Keywords:Dynamic instability, Doubly-tapered composite laminates, Composite beams,Rotating blade, Free vibration
ID Code:983944
Deposited By: MONIQUE LANE
Deposited On:14 Jun 2018 19:37
Last Modified:14 Jun 2018 19:37


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