Journal ArticleDOI
NDT of polymer materials using lock-in thermography with water-coupled ultrasonic excitation
J. Rantala,D. Wu,Gerd Busse +2 more
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TLDR
In this paper, lock-in thermography with ultrasonic heating was used to detect defects in polymer and composite samples. But the applicability of the method was proved with several polymer and composites having delaminations, impact damages, voids, and inclusions.Abstract:
We present an NDT method that uses lock-in thermography with ultrasonic heating. The acoustical damping causes the mechanical energy to be converted to thermal energy. In the defective regions the damping is stronger resulting in higher temperature generation. Thus the heating is selective to defects and gives good defect detectability. Because defects also affect the heat conduction, the method gives combined information of the change of the mechanical and thermal properties of the sample due to defects. The ultrasonic excitation is amplitude modulated and the magnitude and the phase of the temperature are measured by infrared camera and software lock-in detection. The applicability of the method was proved with several polymer and composite samples having delaminations, impact damages, voids, and inclusions.read more
Citations
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Journal ArticleDOI
Lock-in thermography for nondestructive evaluation of materials
Datong Wu,Gerd Busse +1 more
TL;DR: In this paper, the phase sensitive modulation thermography (or "lock-in thermography") combines the advantages of photothermal radiometry with the fast technique of infrared imaging thereby revealing hidden defects in a short time.
Journal ArticleDOI
A review of optical NDT technologies.
TL;DR: Fibre optics features easy integration and embedding, electronic speckle focuses on whole-field high precision detection, infrared thermography has unique advantages for tests of combined materials, and endoscopic technology provides images of the internal surface of the object directly.
Journal ArticleDOI
Prediction of the thermosonic signal from fatigue cracks in metals using vibration damping measurements
TL;DR: In this paper, a set of steel beams with fatigue cracks of different depth and variable partial crack opening was tested using ultrasound stimulated thermography or sonic infrared imaging (SIRI).
Proceedings ArticleDOI
Infrared thermographic detection and characterisation of impact damage in carbon fibre composites: results of the round robin test
Vladimir P. Vavilov,Darryl P Almond,G. Busse,Ermanno G. Grinzato,J. C. Krapez,Xavier Maldague,Sergio Marinetti,W. Peng,V. Shirayev,D. Wu +9 more
TL;DR: In this article, a statistical means for rating non-destructive testing techniques is proposed to convert otiginal infrared images to defect maps that are of special interest for end-users.
Journal ArticleDOI
Time-resolved infrared radiometry with step heating. A review
Robert Osiander,Jane Spicer +1 more
TL;DR: In contrast to most infrared radiometry techniques used for nondestructive evaluation which follow the sample cooling after pulsed heating, the technique termed Time-Resolved Infrared Radiometry with step heating (TRIR) follows the surface temperature rise as a function of time during the heating pulse as mentioned in this paper.
References
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BookDOI
Review of Progress in Quantitative Nondestructive Evaluation
TL;DR: The Review of Progress in Quantitative NDE (ROPQN) as mentioned in this paper is the world's leading conference in reporting annually new research and development results in quantitative NDE and promotes communication between the research and engineering communities and emphasize current reporting of work in progress.
Journal ArticleDOI
Thermal wave imaging with phase sensitive modulated thermography
TL;DR: In this paper, the authors combined thermal wave and thermography to provide a short-time low-frequency phase angle image where non-thermal features can be suppressed using lock-in data analysis.
Journal ArticleDOI
Dehnung von Zink-Kristallen unter Ultraschalleinwirkung
F. Blaha,B. Langenecker +1 more
Journal ArticleDOI
Thermographic investigation of high-power ultrasonic heating in materials
TL;DR: In this article, the authors used an infrared thermovision imaging system to observe the surface temperature distribution caused by the application of high-power 20 kHz ultrasound to a variety of metal specimens and one fluoroplastic.
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Amplitude-Modulated Lock-In Vibrothermography for NDE of Polymers and Composites
J. Rantala,D. Wu,Gerd Busse +2 more