Vibration Analysis of Delaminated Composite Beams in Prebuckled States Using Lower and Upper Bound Solutions

Della, C. and Shu, D. W. (2015) Vibration Analysis of Delaminated Composite Beams in Prebuckled States Using Lower and Upper Bound Solutions. In: 8th International Conference on Materials for Advanced Technologies, Singapore, Asia, 28 Jun-3 Jul 2015,

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Publisher's URL: http://www.mrs.org.sg/icmat2015/public.asp?page=session.asp&sId=19

Abstract

The free vibrations of fibre-reinforced composite beams with single and double delaminations under axial compressive loads have been solved analytically without resorting to numerical approximations. The delaminated composite beams are analyzed as interconnected Euler-Bernoulli beams that are connected at the delamination boundaries. The continuity and equilibrium conditions are satisfied between the adjoining regions of the beams. The differential-stretching between the delaminated layers and the bending-extension coupling are included in the analysis. The lower and upper bounds of the natural frequencies are identified by assuming totally ‘free’ and totally ‘constrained’ deformations of the delaminated layers, respectively. A parametric study is performed to investigate the influence of the axial compressive load on the natural frequency and the mode shape of the delaminated composite beams. Simply supported and the clamped-clamped delaminated beams are considered. A monotonic relation between the natural frequency and the compressive load is observed. Comparisons with the analytical results reported for delamination buckling and vibration verifies the validity of the present solutions.

Item Type:Conference Proceedings
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Della, Dr Christian
Authors: Della, C., and Shu, D. W.
Subjects:T Technology > T Technology (General)
College/School:College of Science and Engineering > School of Engineering

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