The University of Southampton
University of Southampton Institutional Repository

Identification of lightning strike damage using Pulse Thermography through integration of thermal data

Identification of lightning strike damage using Pulse Thermography through integration of thermal data
Identification of lightning strike damage using Pulse Thermography through integration of thermal data
Pulse Thermography (PT) is based on the use of infrared imaging systems to detect thermal decay from a pulsed energy source as it passes through a component or sample. Carbon Fiber Reinforced Polymer (CFRP) composite materials damaged by simulated lightning strike are inspected using PT. A new damage detection approach is proposed which exploits the integral of the difference in temperature data over time between each pixel and a reference non-damaged pixel. The resulting integration provides a value for the thermal decay pixel-by-pixel relative to a non-damaged region, which provides a quantitative damage severity parameter. The proposed data processing method is evaluated using calibrated plate sample made from Glass Fiber Reinforced Polymer (GFRP) composite with known defects, and also to investigate CFRP samples damaged by lightning strikes. The calibrated GFRP plates are 4-ply stitched bi-axial E-glass fibers with a total laminate thickness of 2.4 mm. The known defects are 20 mm square PTFE inserts placed between plies to simulate a delamination. The resulting colormap correctly identifies the known defects and displays constant severity over the PTFE insert region. The same method is applied to the lightning damaged CFRP sample made of 5-ply stitched dry fabric. The resulting integration reveals the full extent of the damage, which cannot be identified by visual inspection.
Harrell, Timothy M.
c97349b6-6f27-423d-b3d1-e35b30552692
Dulieu-Barton, Janice M.
9e35bebb-2185-4d16-a1bc-bb8f20e06632
Thomsen, Ole Thybo
f3e60b22-a09f-4d58-90da-d58e37d68047
Harrell, Timothy M.
c97349b6-6f27-423d-b3d1-e35b30552692
Dulieu-Barton, Janice M.
9e35bebb-2185-4d16-a1bc-bb8f20e06632
Thomsen, Ole Thybo
f3e60b22-a09f-4d58-90da-d58e37d68047

Harrell, Timothy M., Dulieu-Barton, Janice M. and Thomsen, Ole Thybo (2018) Identification of lightning strike damage using Pulse Thermography through integration of thermal data. Society of Experimental Mechanics Annual Conference, Greenville, SC, United States. 04 - 07 Jun 2018. 3 pp .

Record type: Conference or Workshop Item (Paper)

Abstract

Pulse Thermography (PT) is based on the use of infrared imaging systems to detect thermal decay from a pulsed energy source as it passes through a component or sample. Carbon Fiber Reinforced Polymer (CFRP) composite materials damaged by simulated lightning strike are inspected using PT. A new damage detection approach is proposed which exploits the integral of the difference in temperature data over time between each pixel and a reference non-damaged pixel. The resulting integration provides a value for the thermal decay pixel-by-pixel relative to a non-damaged region, which provides a quantitative damage severity parameter. The proposed data processing method is evaluated using calibrated plate sample made from Glass Fiber Reinforced Polymer (GFRP) composite with known defects, and also to investigate CFRP samples damaged by lightning strikes. The calibrated GFRP plates are 4-ply stitched bi-axial E-glass fibers with a total laminate thickness of 2.4 mm. The known defects are 20 mm square PTFE inserts placed between plies to simulate a delamination. The resulting colormap correctly identifies the known defects and displays constant severity over the PTFE insert region. The same method is applied to the lightning damaged CFRP sample made of 5-ply stitched dry fabric. The resulting integration reveals the full extent of the damage, which cannot be identified by visual inspection.

Text
SEM2018_703_har - Accepted Manuscript
Download (214kB)

More information

Published date: 4 June 2018
Venue - Dates: Society of Experimental Mechanics Annual Conference, Greenville, SC, United States, 2018-06-04 - 2018-06-07

Identifiers

Local EPrints ID: 432400
URI: http://eprints.soton.ac.uk/id/eprint/432400
PURE UUID: 89f924f8-9474-4e4e-88df-a4fcedf1a495
ORCID for Timothy M. Harrell: ORCID iD orcid.org/0000-0002-0783-533X

Catalogue record

Date deposited: 12 Jul 2019 16:30
Last modified: 12 Aug 2020 01:44

Export record

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×