The Application of Ultrasonics to the Non-Destructive Testing of Fiber Glass Reinforced Plastics.

1961 ◽  
Author(s):  
W. Hand
Keyword(s):  
Non Destructive Testing ◽  
Fiber Glass ◽  
Destructive Testing ◽  
Reinforced Plastics ◽  
Non Destructive

Non-destructive testing of aerospace composite materials using digital shearography

1998 ◽  
Vol 212 (1) ◽  
pp. 21-30 ◽  
Author(s):  
W Steinchen ◽  
L Yang ◽  
G Kupfer ◽  
P Mäckel
Keyword(s):  
Large Scale ◽  
Laser Interferometry ◽  
Honeycomb Structure ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Measuring Device ◽  
Large Scale Structures ◽  
Reinforced Plastics ◽  
Digital Imaging Processing ◽  
Non Destructive

Digital shearography, a laser interferometry technique in conjunction with the digital imaging processing, has the potential for identifying defects both in small- and large-scale structures. This paper will focus on the recent development of digital shearography for non-destructive testing (NDT). With the improvement of the measuring methods and the development of a small and mobile measuring device in conjunction with a user-guided program, Shearwin, this laser inspection technique can be used easily in the environment of fieldwork. A few examples show its application in the aerospace industry for NDT of composites, e.g. GLARE panel, honeycomb structure and glass (or carbon)-fibre-reinforced plastics, etc.

scholarly journals Non-Destructive Testing of Composites by Ultrasound, Local Defect Resonance and Thermography

Proceedings ◽  
2018 ◽  
Vol 2 (8) ◽  
pp. 554 ◽  
Author(s):  
Mathias Kersemans ◽  
Erik Verboven ◽  
Joost Segers ◽  
Saeid Hedayatrasa ◽  
Wim Van Paepegem
Keyword(s):  
Impact Damage ◽  
A Priori ◽  
Back Surface ◽  
Local Defect ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Flat Bottom ◽  
Reinforced Plastics ◽  
Local Defect Resonance ◽  
Non Destructive

Different non-destructive testing techniques have been evaluated for detecting and assessing damage in carbon fiber reinforced plastics: (i) ultrasonic C-scan, (ii) local defect resonance of front/back surface and (iii) lock-in infrared thermography in reflection. Both artificial defects (flat bottom holes and inserts) and impact damage (barely visible impact damage) have been considered. The ultrasonic C-scans in reflection shows good performance in detecting the defects and in assessing actual defect parameters (e.g., size and depth), but it requires long scanning procedures and water coupling. The local defect resonance technique shows acceptable defect detectability, but has difficulty in extracting actual defect parameters without a priori knowledge. The thermographic inspection is by far the fastest technique, and shows good detectability of shallow defects (depth < 2 mm). Lateral sizing of shallow damage is also possible. The inspection of deeper defects (depth > 3–4 mm) in reflection is problematic and requires advanced post-processing approaches in order to improve the defect contrast to detectable limits.

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