A Michelson type of shear interferometer for non destructive inspection of debondings in structures

• Type: Article in International Conference Proceedings Book
• Date: 1998

Authors

Monteiro, J (Author) Other; Santos, F (Author) Other; José Gonçalves Chousal (Author) FEUP; Mário Vaz (Author) FEUP; Gomes, JFS (Author) Other

Conference proceedings International

Title: THERMAL SPRAY, VOLS 1 AND 2: MEETING THE CHALLENGES OF THE 21ST CENTURY

Pages: 825-829

15th International Thermal Spray Conference

NICE, FRANCE, MAY 25-29, 1998

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Other information

Authenticus ID: P-001-A2T

Abstract (EN): This paper presents some results of an inspection program to detect coating-substract defects using a Michelson type of shear interferometer. Debonding defects are detected by properly loading the surface of the specimen in such a way that the interference fringe pattern is modified, rendering the debond readily visible. Image processing techniques are applied to enhance the detection and better define the debonding geometry. Load conditions, leading to a better detection of debondings, are also discussed The technique allows to obtain information over a large area of the tested part, with a resolution one hundred of the wavelength of the light being used.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 5