Next Article in Journal
Wireless Sensor Network in Agriculture: Model of Cyber Security
Next Article in Special Issue
Dynamic Characteristics and Damage Detection of a Metallic Thermal Protection System Panel Using a Three-Dimensional Point Tracking Method and a Modal Assurance Criterion
Previous Article in Journal
Multi-Object Tracking Algorithm for RGB-D Images Based on Asymmetric Dual Siamese Networks
Previous Article in Special Issue
Defect Detection in Aerospace Sandwich Composite Panels Using Conductive Thermography and Contact Sensors
Open AccessLetter

Identifying Defects in Aerospace Composite Sandwich Panels Using High-Definition Distributed Optical Fibre Sensors

1
Lightweight Manufacturing Centre, Department of Design, Manufacturing and Engineering Management, University of Strathclyde, Glasgow G1 1RD, UK
2
Department of Electronic and Electrical Engineering, University of Strathclyde, Glasgow G1 1RD, UK
3
Collins Aerospace, 1 Dow Avenue, Prestwick International Aerospace Park, Ayrshire KA9 2SA, UK
4
Advanced Forming Research Centre, Department of Design, Manufacturing and Engineering Management, University of Strathclyde, Glasgow G1 1RD, UK
*
Author to whom correspondence should be addressed.
Sensors 2020, 20(23), 6746; https://doi.org/10.3390/s20236746
Received: 23 October 2020 / Revised: 20 November 2020 / Accepted: 23 November 2020 / Published: 25 November 2020
(This article belongs to the Special Issue Damage Detection Systems for Aerospace Applications)
Automated methods for detecting defects within composite materials are highly desirable in the drive to increase throughput, optimise repair program effectiveness and reduce component replacement. Tap-testing has traditionally been used for detecting defects but does not provide quantitative measurements, requiring secondary techniques such as ultrasound to certify components. This paper reports on an evaluation of the use of a distributed temperature measurement system—high-definition fibre optic sensing (HD-FOS)—to identify and characterise crushed core and disbond defects in carbon fibre reinforced polymer (CFRP)-skin, aluminium-core, sandwich panels. The objective is to identify these defects in a sandwich panel by measuring the heat transfer through the panel thickness. A heater mat is used to rapidly increase the temperature of the panel with the HD-FOS sensor positioned on the top surface, measuring temperature. HD-FOS measurements are made using the Luna optical distributed sensor interrogator (ODISI) 9100 system comprising a sensor fabricated using standard single mode fibre (SMF)-20 of external diameter 250 μm, including the cladding. Results show that areas in which defects are present modulate thermal conductivity, resulting in a lower surface temperature. The resultant data are analysed to identify the length, width and type of defect. The non-invasive technique is amenable to application in challenging operational settings, offering high-resolution visualisation and defect classification. View Full-Text
Keywords: HD-FOS; OFDR; aerospace; thermal analysis HD-FOS; OFDR; aerospace; thermal analysis
Show Figures

Figure 1

MDPI and ACS Style

Mills, J.A.; Hamilton, A.W.; Gillespie, D.I.; Andonovic, I.; Michie, C.; Burnham, K.; Tachtatzis, C. Identifying Defects in Aerospace Composite Sandwich Panels Using High-Definition Distributed Optical Fibre Sensors. Sensors 2020, 20, 6746. https://doi.org/10.3390/s20236746

AMA Style

Mills JA, Hamilton AW, Gillespie DI, Andonovic I, Michie C, Burnham K, Tachtatzis C. Identifying Defects in Aerospace Composite Sandwich Panels Using High-Definition Distributed Optical Fibre Sensors. Sensors. 2020; 20(23):6746. https://doi.org/10.3390/s20236746

Chicago/Turabian Style

Mills, James A.; Hamilton, Andrew W.; Gillespie, David I.; Andonovic, Ivan; Michie, Craig; Burnham, Kenneth; Tachtatzis, Christos. 2020. "Identifying Defects in Aerospace Composite Sandwich Panels Using High-Definition Distributed Optical Fibre Sensors" Sensors 20, no. 23: 6746. https://doi.org/10.3390/s20236746

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Search more from Scilit
 
Search
Back to TopTop