Special Section on Structural Health Monitoring: Use of Guided Waves and/or Nonlinear Acoustic Techniques

Damage detection tomography based on guided waves in composite structures using a distributed sensor network

[+] Author Affiliations
Vittorio Memmolo, Leandro Maio, Natalino Daniele Boffa, Ernesto Monaco, Fabrizio Ricci

University of Naples FEDERICO II, Department of Industrial Engineering—Aerospace Division, Via Claudio, 21, Naples 80125, Italy

Opt. Eng. 55(1), 011007 (Oct 20, 2015). doi:10.1117/1.OE.55.1.011007
History: Received May 18, 2015; Accepted September 16, 2015
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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.

© 2015 Society of Photo-Optical Instrumentation Engineers

Citation

Vittorio Memmolo ; Leandro Maio ; Natalino Daniele Boffa ; Ernesto Monaco and Fabrizio Ricci
"Damage detection tomography based on guided waves in composite structures using a distributed sensor network", Opt. Eng. 55(1), 011007 (Oct 20, 2015). ; http://dx.doi.org/10.1117/1.OE.55.1.011007


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