Vibration analysis of laminated composite plates: TV-holography and finite element method

An experimental and numerical investigation into the structural behaviour of symmetrically laminated carbon fibre-epoxy composite rectangular plates subjected to vibration. The laminated composite plates are composed on layers of Grafil XAS carbon fibres preimpregnated in 914C Fibredux epoxy resin and each plate was vibrated by a piezoelectric transducer (PZT) attached onto its surface. The specimens tested were of two different length to width ratios and of symmetric stacking sequence. In this study the short edges of the plate were of various combinations of clamp and free support conditions, and the long edges of the plate were of various combinations of free and simple support conditions. Experimental and finite element studies were carried out in parallel. The experimental vibrational response of the test plates were obtained using a TV-holography technique. The comparison between experimental results and finite element results are reasonably good in all the cases studied.