Volume 21, Issue 1, 2012

Full Articles: INVESTIGATION OF FREE VIBRATION RESPONSE OF E-GLASS/EPOXY DELAMINATED COMPOSITE PLATES

Turan Ercopur^a, Binnur Goren Kiralb^b*

^aDokuz Eylul University, The Graduate School of Natural and Applied Sciences, Tinaztepe, Izmir, Turkey.

^bDokuz Eylul University, Faculty of Engineering, Department of Mechanical Engineering, 35100, Bornova, Izmir, Turkey.

*Author to whom correspondence should be addressed Tel.: +90 232 3883138/220, Fax: +90 232 3887868 E-mail: binnur.goren@deu.edu.tr

Received 24 February 2011; accepted 17 January 2012

ABSTRACT

This paper deals with the finite element analysis of free vibration response of the delaminated composite plates. Free vibration analysis is performed by using ANSYS commercial software developing parametric input files. Natural frequency values and associated mode shapes of E-glass/epoxy composite delaminated plates are determined. Effects of delamination shape, dimension and location on the natural frequency and associated mode shapes are investigated and for the purpose of the observing the effect of the boundary conditions, cantilever and clamped-pinned delaminated composite plates are taken into consideration. Comparisons with the results in literature verify the validity of the developed models in this study. It is observed that the natural frequency decreases in the existence of the delamination and level of the decrease depends on the dimension, shape and location of the delamination.

Keywords:Laminated composite plate, delamination, natural frequency, mode shape.