Delamination detection in composite laminates from variations of their modal characteristics

S. H. Diaz Valdes, C. Soutis

Research output: Contribution to journalArticlepeer-review


As a first step in developing a health monitoring system, the effect of delamination on the modal 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 sensors. Modal frequencies were obtained using concepts of resonant ultrasound spectroscopy (RUS). Changes of the modal frequencies after delamination initiation, compared to those of a non-delaminated specimen, gave a good indication of the degree of damage, demonstrating the feasibility of using measured changes in the vibration characteristics to detect damage.
Original languageEnglish
Pages (from-to)27-33
Number of pages6
JournalJournal of Low Frequency Noise Vibration and Active Control
Issue number1
Publication statusPublished - Mar 2000


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