Detecting damage in composite material using nonlinear elastic wave spectroscopy methods

Michele Meo, Umberto Polimeno, G Zumpano

Research output: Contribution to journalArticle

141 Citations (Scopus)

Abstract

Modern aerospace structures make increasing use of fibre reinforced plastic composites, due to their high specific mechanical properties. However, due to their brittleness, low velocity impact can cause delaminations beneath the surface, while the surface may appear to be undamaged upon visual inspection. Such damage is called barely visible impact damage (BVID). Such internal damages lead to significant reduction in local strengths and ultimately could lead to catastrophic failures. It is therefore important to detect and monitor damages in high loaded composite components to receive an early warning for a well timed maintenance of the aircraft. Non-linear ultrasonic spectroscopy methods are promising damage detection and material characterization tools. In this paper, two different non-linear elastic wave spectroscopy (NEWS) methods are presented: single mode nonlinear resonance ultrasound (NRUS) and nonlinear wave modulation technique (NWMS). The NEWS methods were applied to detect delamination damage due to low velocity impact (
Original languageEnglish
Pages (from-to)115-126
Number of pages12
JournalApplied Composite Materials
Volume15
Issue number3
DOIs
Publication statusPublished - May 2008

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