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- Title
Digital interferometry with image processing and computational techniques for NDT of composite materials.
- Authors
Anouncia, S. M.
- Abstract
The aerospace and automotive industries have been developing and the demand for non-destructive testing (NDT) of composite materials used by these two fields is increasing day by day. Some of the NDT methods applied to ensure that composite materials (metal matrix, polymer matrix and ceramic matrix) are free from defects include liquid penetrant, magnetic particle, eddy current, ultrasonic, radiographic, optical, sonic resonance and infrared thermographic testing. Though there exist a variety of NDT approaches for defect detection, the materials and their construction methods, along with the size of the components, have a significant role in determining the type of NDT to use. Recently, optical-based NDT methods have been gaining momentum as they offer a high level of precision in defect detection. In addition, due to the increasing interest in digital image processing, optical NDT (ONDT) methods combined with digital image processing tend to yield the most sophisticated process for reliable and accurate detection of defects. This paper attempts to provide insight concerning the various NDT methods used for composite materials, with a focus on digital interferometry techniques such as electronic speckle pattern interferometry (E5PI), shearography and holography. In addition, the study highlights the opportunities to include digital image processing and other computational techniques to produce a better system.
- Subjects
NONDESTRUCTIVE testing; COMPOSITE materials testing; IMAGE processing; ELECTRONIC speckle pattern interferometry; SHEAROGRAPHY
- Publication
Insight: Non-Destructive Testing & Condition Monitoring, 2018, Vol 60, Issue 12, p685
- ISSN
1354-2575
- Publication type
Article
- DOI
10.1784/insi.2018.60.12.685