Vibration of delaminated multilayer beams

Della, Christian N. and Shu, Dongwei (2006) Vibration of delaminated multilayer beams. Composites Part B: Engineering, 37, (2-3), 227-236. (doi:10.1016/j.compositesb.2005.05.006).


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The free vibration of delaminated multilayer beams is analyzed. Both the ‘free mode’ and ‘constrained mode’ analyses in the study of delamination vibration are used. Two parameters are introduced, namely, the normalized axial stiffness and the normalized bending stiffness. These parameters provide a better insight on the vibration behavior of the delaminated beam. A relative slenderness ratio specific for delamination vibration is further introduced, which is shown to influence the vibration behavior of the beam. Global, mixed and local vibration modes occur depending upon the relative slenderness ratio of the beam. In addition, for three-layer beams with double delaminations, the lower and upper bounds of the natural frequency are obtained by assuming a totally ‘free’ and totally ‘constrained’ deformations of the delaminated layers. These bounds are easy to compute and provide useful approximations.

Item Type: Article
Digital Object Identifier (DOI): doi:10.1016/j.compositesb.2005.05.006
ISSNs: 1359-8368 (print)
Related URLs:
Keywords: layered structures, vibration, delamination, mechanical properties, slenderness ratio
Subjects: T Technology > TJ Mechanical engineering and machinery
T Technology > TA Engineering (General). Civil engineering (General)
Divisions : University Structure - Pre August 2011 > School of Engineering Sciences > Fluid-Structure Interactions
ePrint ID: 50336
Accepted Date and Publication Date:
March 2006Published
2 August 2004Submitted
Date Deposited: 18 Feb 2008
Last Modified: 31 Mar 2016 12:27

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