Affiliations: Institute of Fluid Flow Machinery, Polish Academy of
Sciences, Poland
Note: [] Corresponding author: A. Żak, Institute of Fluid Flow
Machinery, Polish Academy of Sciences, ul. Gen. J. Fiszera 14, 80-952
Gdaásk, Poland. Tel.: +48 58 341 12 71, ext. 260; Fax: +48 58 341 61 44;
E-mail: azak@imp.gda.pl
Abstract: Certain results are presented in this paper on damped vibration of a
laminated cantilever beam with a single closing delamination. In order to
investigate this task the finite element method has been applied in the current
study. For modelling the beam higher order shear deformation beam finite
elements have been used. The vibration of the beam is investigated in the time
domain using a dynamic contact algorithm developed by the authors. The
algorithm is based on the Newmark method and also incorporates a Newton-Raphson
based procedure for resolving the equation of motion. The time series obtained
from solving the equation of motion have been subsequently analysed in the
frequency domain by using FFT (Fast Fourier Transform). The vibration responses
of the beam due to various harmonic and impulse excitations, at different
delamination locations, and for different delamination lengths, as well as
changes in the dissipation of damping energy due to the delamination, have all
been considered in the paper.
