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Optical Engineering

Damage detection tomography based on guided waves in composite structures using a distributed sensor network
Author(s): Vittorio Memmolo; Leandro Maio; Natalino Daniele Boffa; Ernesto Monaco; Fabrizio Ricci
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Paper Abstract

Structural health monitoring (SHM) based on guided waves allows assessing the health of a structure due to the sensitivity to the occurrence of delamination. However, wave propagation presents several complexities for effective damage identification in composite structures. An efficient implementation of a guided wave-based SHM system requires an accurate analysis of collected data to obtain a useful detection. This paper is concerned with the identification of small emerging delaminations in composite structural components using a sparse array of surface ultrasonic transducers. An ultrasonic-guided wave tomography technique focused on impact damage detection in composite plate-like structures is presented. A statistical damage index approach is adopted to interpret the recorded signals, and a subsequent graphic interpolation is implemented to reconstruct the damage appearance. Experimental tests carried out on a typical composite structure demonstrated the effectiveness of the developed technique with the aim to investigate the presence and location of damage using simple imaging reports and a limited number of measurements. A traditional ultrasonic inspection (C-scan) is used to assess the methodology.

Paper Details

Date Published: 20 October 2015
PDF: 11 pages
Opt. Eng. 55(1) 011007 doi: 10.1117/1.OE.55.1.011007
Published in: Optical Engineering Volume 55, Issue 1
Show Author Affiliations
Vittorio Memmolo, Univ. degli Studi di Napoli Federico II (Italy)
Leandro Maio, Univ. degli Studi di Napoli Federico II (Italy)
Natalino Daniele Boffa, Univ. degli Studi di Napoli Federico II (Italy)
Ernesto Monaco, Univ. degli Studi di Napoli Federico II (Italy)
Fabrizio Ricci, Univ. degli Studi di Napoli Federico II (Italy)

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