Lock-In Infrared Thermography for Non-Destructive Testing of Grid Stiffened Composite Structure

2012 ◽  
Vol 5 (2) ◽  
pp. 593-596
Author(s):  
Yanguang Zhao ◽  
Xinglin Guo ◽  
Mingfa Ren
Keyword(s):  
Infrared Thermography ◽  
Composite Structure ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Lock In ◽  
Non Destructive

scholarly journals Porosity and Inclusion Detection in CFRP by Infrared Thermography

2012 ◽  
Vol 2012 ◽  
pp. 1-6 ◽  
Author(s):  
C. Toscano ◽  
C. Meola ◽  
M. C. Iorio ◽  
G. M. Carlomagno
Keyword(s):  
Infrared Thermography ◽  
Production Costs ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Evaluation Methodologies ◽  
Slag Inclusions ◽  
Aeronautical Industry ◽  
Testing Techniques ◽  
Lock In ◽  
Non Destructive

The ever wide use of composite materials in the aeronautical industry has evidenced the need for development of ever more effective nondestructive evaluation methodologies in order to reduce rejected parts and to optimize production costs. Infrared thermography has been recently enclosed amongst the standardized non destructive testing techniques, but its usefulness needs still complete assessment since it can be employed in several different arrangements and for many purposes. In this work, the possibility to detect slag inclusions and porosity is analyzed with both lock-in themography and pulse thermography in the transmission mode. To this end, carbon-fiber-peinforced polymers different specimens are specifically fabricated of several different stacking sequences and with embedded slag inclusions and porosity percentages. As main results, both of the techniques are found definitely able to reveal the presence of the defects above mentioned. Moreover, these techniques could be considered complementary in order to better characterize the nature of the detected defects.

Lock-In Infrared Thermography for the Non-Destructive Testing of Fatigue Specimen with Defects

2010 ◽  
Vol 30 (10) ◽  
pp. 2776-2781 ◽  
Author(s):  
赵延广 Zhao Yanguang ◽  
郭杏林 Guo Xinlin ◽  
任明法 Ren Mingfa
Keyword(s):  
Infrared Thermography ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Fatigue Specimen ◽  
Lock In ◽  
Non Destructive

Lock-in Infrared Thermography for the Non-Destructive Testing of Fatigue Specimen with Defects

2010 ◽  
Vol 44-47 ◽  
pp. 576-580
Author(s):  
Yan Guang Zhao ◽  
Xing Lin Guo ◽  
Ming Fa Ren
Keyword(s):  
Infrared Thermography ◽  
Phase Image ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Amplitude Image ◽  
Fatigue Specimen ◽  
Testing Frequency ◽  
Lock In ◽  
Non Destructive ◽  
Precise Testing

Lock-in infrared thermography method was gradually being used in fatigue studies because of its advantages such as real-time, quick-reaction, non-contact, non-destructive and so on. In this paper, non-destructive testing was applied to fatigue specimen with defects, based on lock-in infrared thermography. In parallel, the result was analyzed by using lock-in infrared thermography system developed by Cedip in French. The results show that more information of internal detects can be found from phase image than that from amplitude image. The experiment procedure indicated that a proper testing frequency was the key to the non-destructive testing. The data revealed that deeper depth and larger area of defect led to a precise testing result.

scholarly journals Improvement of the Non-Destructive Testing of Heritage Mural Paintings Using Stimulated Infrared Thermography and Frequency Image Processing

2019 ◽  
Vol 5 (9) ◽  
pp. 72
Author(s):  
Kamel Mouhoubi ◽  
Vincent Detalle ◽  
Jean-Marc Vallet ◽  
Jean-Luc Bodnar
Keyword(s):  
Infrared Thermography ◽  
Cultural Property ◽  
Wall Paintings ◽  
Non Destructive Testing ◽  
Property A ◽  
Destructive Testing ◽  
Mural Paintings ◽  
Works Of Art ◽  
Optical Effects ◽  
Non Destructive

Within the framework of conservation and assistance for the restoration of cultural property, a method of analysis assistance has been developed to help in the restoration of cultural heritage. Several collaborations have already demonstrated the possibility of defects detection (delamination, salts) in murals paintings using stimulated infrared thermography. One of the difficulties encountered with infrared thermography applied to the analysis of works of art is the remanence of the pictorial layer. This difficulty can sometimes induce detection artifacts and false positives. A method of thermograms post-processing called PPT (pulse phase thermography) is described. The possibilities offered by the PPT in terms of reducing the optical effects associated with the pictorial layer are highlighted first with a simulation, and then through experiments. This approach can significantly improve the study of painted works of art such as wall paintings.

scholarly journals Erratum to: Contribution to the improvement of heritage mural painting non-destructive testing by stimulated infrared thermography

2013 ◽  
Vol 64 (1) ◽  
pp. 11003 ◽  
Author(s):  
Jean-Luc Bodnar ◽  
Kamel Mouhoubi ◽  
Luigi Di Pallo ◽  
Vincent Detalle ◽  
Jean-Marc Vallet ◽  
...  
Keyword(s):  
Infrared Thermography ◽  
Mural Painting ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Non Destructive
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