Investigations of Single and Multilayer Structures Using Lock-In Thermography - Possible Applications

• Autorzy: Gralewicz G. , Owczarek G. , Więcek B.
• Języki publikacji: EN

Abstrakty

EN

This paper presents a study of the possibilities of evaluating thermal parameters of single and multilayer structures using dynamic thermography. It also discusses potential uses of lock-in thermography. It presents a simulation of a periodic excitation of a multilayer composite material. In practice, the described methods can be employed in various applications, for example, in multilayer nonwoven microelectronic components manufactured from hemp fibers, chemical fibers, with an addition of electrically conducting fibers, and in medicine and biology. This paper describes tests conducted with lock-in thermography on carbon fibre reinforced composites with implanted delamination defects. Lock-in thermography is a versatile tool for non-destructive evaluation (NDE). Lock-in thermography is a fast, remote and non-destructive procedure. Hence, it has been used to detect delaminations in the composite structure of aircraft. This method directly contributes to an improvement in safety.

Słowa kluczowe

EN

lock-in and pulse thermography; NDT; transient state thermal modelling; effusivity and diffusivity

PL

tkaniny na odzież ochronną; materiały na środki ochrony indywidualnej; materiały izolacyjne; termografia

• Wydawca: Taylor & Francis
• Czasopismo: International Journal of Occupational Safety and Ergonomics
• Rocznik: 2005
• Tom: Vol. 11, No. 2
• Strony: 211--215
• Opis fizyczny: Bibliogr. 9 poz., rys., tab., wykr.

Twórcy

autor

Gralewicz G.

• Department of Personal Protective Equipment, Central Institute for Labour Protection – National Research Institute, Łódź, Poland

autor

Owczarek G.

• Department of Personal Protective Equipment, Central Institute for Labour Protection – National Research Institute, Łódź, Poland

autor

Więcek B.

• Institute of Electronics, Technical University of Łódź, Łódź, Poland

Bibliografia

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• 3. Krapez J-C. Compared performances of four algorithms used for digital lockin thermography. In: Proceedings of the Eurotherm Seminar 60: Quantitative Infrared Thermography 4—QIRT ’98, September 7– 10, 1998, Łódź, Poland. Retrieved July 15, 2004, from: http://www.onera.fr/SEARCH/BASIS/public/web_en/document/DDD/ 301679.pdf
• 4. Netzelmann U, Walle G. High-speed pulsed thermography of thin metallic coatings. In: Proceedings of the Eurotherm Seminar 60 Quantitative Infrared Thermography–QIRT ’98, September 7–10, 1998, Łódź, Poland, p. 81–5.
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• 6. Almond D, Busse G, Grinzato E, Krapez JC, Maldague X, Vavilov V, et al. Infrared thermographic detection and characterisation of impact damage in carbon fibre composites: results of the round robin test. In: Proceedings of the Eurotherm Seminar 60 Quantitative Infrared Thermography— QIRT ’98, September 7–10, 1998, Łódź, Poland, p. 43–52.
• 7. Krucińska I, Michalak M. Barrier properties of textiles with hemp fiber components. In: Włókiennictwo: 2nd international conference, MTE 2000, Metrology in Textile Engineering. 1st international workshop, NETECOFLAX-2000, Ecological high quality cottonized flax fabrics production from worthless raw material, November 23– 24, 2000, Łódź, Poland (Zeszyty Naukowe, No. 855). Łódź, Poland: Wydawnictwo Politechniki Łódzkiej; 2000.
• 8. Michalak M, Krucińska I, Więcek B. Application of thermography for slow and fast varying thermal processes in textile research In: Proceedings of Eurotherm Seminar No. 64, Reims, France, July 18–21, 2000. p. 283–8.
• 9. Więcek B, Zwolenik S. Thermal wave method—limits and potentialities of active thermography in biology and medicine. In: 2nd Joint EMBS-BMES Conference, 24th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, BMES-EMS 2002, Houston, TX, USA, October 23–26, 2002.