DocumentCode :
1524238
Title :
Surface Crack Detection for Carbon Fiber Reinforced Plastic (CFRP) Materials Using Pulsed Eddy Current Thermography
Author :
Cheng, Liang ; Tian, Gui Yun
Author_Institution :
Sch. of Electr., Electron. & Comput. Eng., Univ. of Newcastle, Newcastle upon Tyne, UK
Volume :
11
Issue :
12
fYear :
2011
Firstpage :
3261
Lastpage :
3268
Abstract :
There is currently a requirement in many industries to inspect carbon fiber reinforced plastic (CFRP) components, such as those used in aircraft and for wind turbine blades to identify issues leading to potential failures. To detect surface cracks, pulsed eddy current (PEC) thermography is proposed as a powerful inspection technique, allowing the operator to observe the heating developed from the eddy current distribution in a structure using infrared imaging, detecting defects over a relatively wide area within a short time (of the order of milliseconds). In this paper, a PEC thermography inspection system for CFRP materials is studied and optimized. Using the system, the directional electrical conductivity of the CFRP material is observed through the surface heating pattern. Then, the normalized temperature rise and decay are investigated through the inspection of notches with varied depths and widths. The position invariance of the coil with respect to the notch along the fiber direction is also studied in the experiments. The work shows that PEC thermography can be used for defect detection and characterization through analysis of the surface heating pattern and the transient temperature change.
Keywords :
carbon fibre reinforced plastics; infrared imaging; nondestructive testing; surface cracks; aircraft; carbon fiber reinforced plastic materials; infrared imaging; inspection technique; pulsed eddy current thermography; surface crack detection; surface heating pattern; transient temperature change; wind turbine blades; Conductivity; Cooling; Eddy currents; Surface treatment; Thermography; Transient analysis; Carbon fiber reinforced plastic (CFRP); nondestructive testing and evaluation (NDT&E); pulsed eddy current (PEC) thermography; surface defects;
fLanguage :
English
Journal_Title :
Sensors Journal, IEEE
Publisher :
ieee
ISSN :
1530-437X
Type :
jour
DOI :
10.1109/JSEN.2011.2157492
Filename :
5772899
Link To Document :
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