Application of the rapid frequency sweep technique for delamination detection in composite laminates

S.H. Diaz Valdes, C. Soutis

Research output: Contribution to journalArticlepeer-review

Abstract

As a first step in developing a health monitoring system, the effect of delamination on the natural frequencies of laminated composite beams has been investigated. A piezoceramic patch driven with a linear rapid frequency sweep was used to induce vibrations on the structure and its response registered via piezoelectric film sensors. Modal frequencies were obtained through a method defined here as the maximum amplitude at resonance (MAR), which has proved to be a simple and effective procedure. Changes of the modal frequencies after delamination initiation, compared to those of an uncracked (non-delaminated) specimen, gave a good indication of the degree of damage, especially at high modal frequencies (9-12 kHz).
Original languageEnglish
Pages (from-to)19-23
Number of pages5
JournalAdvanced Composites Letters
Volume8
Issue number1
DOIs
Publication statusPublished - Jan 1999

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