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Sensors 2017, 17(5), 1178; doi:10.3390/s17051178

Impact Damage Localisation with Piezoelectric Sensors under Operational and Environmental Conditions

Department of Aeronautics, Imperial College London, Kensington, London SW7 2AZ, UK
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Author to whom correspondence should be addressed.
Academic Editor: Vittorio M. N. Passaro
Received: 29 March 2017 / Revised: 15 May 2017 / Accepted: 16 May 2017 / Published: 22 May 2017
(This article belongs to the Special Issue Sensor Technologies for Health Monitoring of Composite Structures)
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Abstract

Guided-wave structural health monitoring (SHM) systems with piezoelectric sensors are investigated for localisation of barely visible impact damage in CFRP plates under vibration and different thermal conditions. A single baseline set is used in a delay-and-sum algorithm with temperature correction for damage localisation in a large temperature range. Damage localisation is also demonstrated under transient thermal conditions, with signals recorded while the temperature is rapidly decreased. Damage severity due to successive impact events is studied under constant temperature. Damage is also localised when the plate is subjected to random vibration. View Full-Text
Keywords: structural health monitoring; temperature compensation; Lamb wave; CFRP; delay and sum; piezoelectric; vibration structural health monitoring; temperature compensation; Lamb wave; CFRP; delay and sum; piezoelectric; vibration
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Salmanpour, M.S.; Sharif Khodaei, Z.; Aliabadi, M.H.F. Impact Damage Localisation with Piezoelectric Sensors under Operational and Environmental Conditions. Sensors 2017, 17, 1178.

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