Image processing based quantitative damage evaluation in composites with long pulse thermography

Zijun Wang, Gui Yun Tian, Michele Meo, Francesco Ciampa

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

Pulsed thermography is a contactless and rapid non-destructive evaluation (NDE) technique that is widely used for the inspection of fibre reinforced plastic composites. However, pulsed thermography uses expensive and specialist equipment such high-energy flash lamps to generate heat into the sample, so that alternative thermal stimulation sources are needed. Long pulse thermography was recently developed as a cost-effective solution to enhance the defect detectability in composites by generating step-pulse heat into the test sample with inexpensive quartz halogen lamps and measuring the thermal response during the material cooling down. This paper provides a quantitative comparison of long pulse thermography with traditional pulsed thermography and step heating thermography in carbon fibre and glass fibre composites with flat-bottomed holes located at various depths. The three thermographic methods are processed with advanced thermal image algorithms such as absolute thermal contrast, thermographic signal reconstruction, phase Fourier analysis and principal component analysis in order to reduce thermal image artefacts. Experimental tests have shown that principal component analysis applied to long pulse thermography provides accurate imaging results over traditional pulsed thermography and step heating thermography. Hence, this inspection technique can be considered as an efficient and cost-effective thermographic method for low thermal conductivity and low thermal response rate materials.

Original languageEnglish
Pages (from-to)93-104
Number of pages12
JournalNDT and E International
Volume99
Early online date6 Jul 2018
DOIs
Publication statusPublished - 1 Oct 2018

Fingerprint

image processing
Image processing
damage
composite materials
evaluation
Composite materials
pulses
principal components analysis
Electric lamps
Principal component analysis
inspection
Inspection
reinforced plastics
costs
Signal reconstruction
Heating
flash lamps
heat
Fiber reinforced plastics
Quartz

Keywords

  • Infrared thermography
  • Long pulse thermography
  • Principal component analysis
  • Thermographic signal reconstruction

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

Cite this

Image processing based quantitative damage evaluation in composites with long pulse thermography. / Wang, Zijun; Tian, Gui Yun; Meo, Michele; Ciampa, Francesco.

In: NDT and E International, Vol. 99, 01.10.2018, p. 93-104.

Research output: Contribution to journalArticle

@article{2955ead9addb4171a5f7c579e55b8c86,
title = "Image processing based quantitative damage evaluation in composites with long pulse thermography",
abstract = "Pulsed thermography is a contactless and rapid non-destructive evaluation (NDE) technique that is widely used for the inspection of fibre reinforced plastic composites. However, pulsed thermography uses expensive and specialist equipment such high-energy flash lamps to generate heat into the sample, so that alternative thermal stimulation sources are needed. Long pulse thermography was recently developed as a cost-effective solution to enhance the defect detectability in composites by generating step-pulse heat into the test sample with inexpensive quartz halogen lamps and measuring the thermal response during the material cooling down. This paper provides a quantitative comparison of long pulse thermography with traditional pulsed thermography and step heating thermography in carbon fibre and glass fibre composites with flat-bottomed holes located at various depths. The three thermographic methods are processed with advanced thermal image algorithms such as absolute thermal contrast, thermographic signal reconstruction, phase Fourier analysis and principal component analysis in order to reduce thermal image artefacts. Experimental tests have shown that principal component analysis applied to long pulse thermography provides accurate imaging results over traditional pulsed thermography and step heating thermography. Hence, this inspection technique can be considered as an efficient and cost-effective thermographic method for low thermal conductivity and low thermal response rate materials.",
keywords = "Infrared thermography, Long pulse thermography, Principal component analysis, Thermographic signal reconstruction",
author = "Zijun Wang and Tian, {Gui Yun} and Michele Meo and Francesco Ciampa",
year = "2018",
month = "10",
day = "1",
doi = "10.1016/j.ndteint.2018.07.004",
language = "English",
volume = "99",
pages = "93--104",
journal = "NDT and E International",
issn = "0963-8695",
publisher = "Elsevier",

}

TY - JOUR

T1 - Image processing based quantitative damage evaluation in composites with long pulse thermography

AU - Wang, Zijun

AU - Tian, Gui Yun

AU - Meo, Michele

AU - Ciampa, Francesco

PY - 2018/10/1

Y1 - 2018/10/1

N2 - Pulsed thermography is a contactless and rapid non-destructive evaluation (NDE) technique that is widely used for the inspection of fibre reinforced plastic composites. However, pulsed thermography uses expensive and specialist equipment such high-energy flash lamps to generate heat into the sample, so that alternative thermal stimulation sources are needed. Long pulse thermography was recently developed as a cost-effective solution to enhance the defect detectability in composites by generating step-pulse heat into the test sample with inexpensive quartz halogen lamps and measuring the thermal response during the material cooling down. This paper provides a quantitative comparison of long pulse thermography with traditional pulsed thermography and step heating thermography in carbon fibre and glass fibre composites with flat-bottomed holes located at various depths. The three thermographic methods are processed with advanced thermal image algorithms such as absolute thermal contrast, thermographic signal reconstruction, phase Fourier analysis and principal component analysis in order to reduce thermal image artefacts. Experimental tests have shown that principal component analysis applied to long pulse thermography provides accurate imaging results over traditional pulsed thermography and step heating thermography. Hence, this inspection technique can be considered as an efficient and cost-effective thermographic method for low thermal conductivity and low thermal response rate materials.

AB - Pulsed thermography is a contactless and rapid non-destructive evaluation (NDE) technique that is widely used for the inspection of fibre reinforced plastic composites. However, pulsed thermography uses expensive and specialist equipment such high-energy flash lamps to generate heat into the sample, so that alternative thermal stimulation sources are needed. Long pulse thermography was recently developed as a cost-effective solution to enhance the defect detectability in composites by generating step-pulse heat into the test sample with inexpensive quartz halogen lamps and measuring the thermal response during the material cooling down. This paper provides a quantitative comparison of long pulse thermography with traditional pulsed thermography and step heating thermography in carbon fibre and glass fibre composites with flat-bottomed holes located at various depths. The three thermographic methods are processed with advanced thermal image algorithms such as absolute thermal contrast, thermographic signal reconstruction, phase Fourier analysis and principal component analysis in order to reduce thermal image artefacts. Experimental tests have shown that principal component analysis applied to long pulse thermography provides accurate imaging results over traditional pulsed thermography and step heating thermography. Hence, this inspection technique can be considered as an efficient and cost-effective thermographic method for low thermal conductivity and low thermal response rate materials.

KW - Infrared thermography

KW - Long pulse thermography

KW - Principal component analysis

KW - Thermographic signal reconstruction

UR - http://www.scopus.com/inward/record.url?scp=85053194872&partnerID=8YFLogxK

U2 - 10.1016/j.ndteint.2018.07.004

DO - 10.1016/j.ndteint.2018.07.004

M3 - Article

VL - 99

SP - 93

EP - 104

JO - NDT and E International

JF - NDT and E International

SN - 0963-8695

ER -