
Proceedings Paper
NDE of composite structures using ultrasonic guided wavesFormat | Member Price | Non-Member Price |
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Paper Abstract
Composite structures require a rigorous program of nondestructive inspection and maintenance to detect and characterize
hidden defects at an early stage of their occurrence so that preventive measures can be taken before the structure loses its load
carrying capacity or suffers from catastrophic failure. Current methods for defects detection in large aircraft and aerospace
structures are slow, labor intensive and costly. This is especially true for composite structures where conventional
techniques are often ineffective. Ultrasonic guided waves offer an attractive complementary tool for improving inspection
techniques in relatively large plate-like structural components due to their large propagation range and sensitivity to defects in
their propagation path. Since the waves are affected by the geometrical structural features (e.g. stringers) as well as harmful
defects (e.g. delaminations), the application of guided waves in the NDE or SHM of real structures requires a good
understanding of these interaction effects. This will help identify the defects from their distinguishing features in the signal in
structural components with complex geometry. In this paper a detailed study of the interaction of guided waves with defects
in an aluminum plate and a honeycomb composite sandwich structure is carried out using numerical simulations and
laboratory experiments. The simpler aluminum plate is used for model validation and understanding the basic characteristics
of the interaction phenomena. The agreement between the simulated waveforms and those measured from the experiments
are found to be excellent in both cases indicating the possibility of applying guided wave based techniques to more realistic
structures.
Paper Details
Date Published: 17 April 2013
PDF: 11 pages
Proc. SPIE 8695, Health Monitoring of Structural and Biological Systems 2013, 86950E (17 April 2013); doi: 10.1117/12.2009845
Published in SPIE Proceedings Vol. 8695:
Health Monitoring of Structural and Biological Systems 2013
Tribikram Kundu, Editor(s)
PDF: 11 pages
Proc. SPIE 8695, Health Monitoring of Structural and Biological Systems 2013, 86950E (17 April 2013); doi: 10.1117/12.2009845
Show Author Affiliations
Ajit Mal, Univ. of California, Los Angeles (United States)
Fabrizio Ricci, Univ. degli Studi di Napoli Federico II (Italy)
Fabrizio Ricci, Univ. degli Studi di Napoli Federico II (Italy)
Himadri Samajder, Univ. of California, Los Angeles (United States)
Harsh Baid, AlphaSTAR Corp. (United States)
Harsh Baid, AlphaSTAR Corp. (United States)
Published in SPIE Proceedings Vol. 8695:
Health Monitoring of Structural and Biological Systems 2013
Tribikram Kundu, Editor(s)
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