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Proceedings Paper

Nondestructive evaluation of fiber-reinforced polymer composites by an all-fiber-optic phase-shifting electronic speckle pattern interferometer
Author(s): Vadakke Matham Murukeshan; A. R. Ganesan; Rajpal S. Sirohi; Sant Kumar Malhotra
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Paper Abstract

In this paper, we present the developmental details of an all fiber optic phase shifting Electronic Speckle Pattern Interferometer (ESPI) and its applications in Non-Destructive Evaluation (NDE) of Glass Fiber Reinforced Plastics (GFRP). Laminates made of GFRP are studied using the developed ESPI system in its shear configuration. This provides a full-field, non-contact method for NDE, and also observation of surface strains which are proportional to displacement derivatives. Since defects in objects usually induce strain concentrations, shear ESPI reveals defects by identifying anomalies in strain concentration. Experiments have been carried out for NDE of unidirectional GFRP specimens at different fiber orientations and having programmed defects. The experimental results are compared with the theoretical predictions.

Paper Details

Date Published: 20 March 1997
PDF: 7 pages
Proc. SPIE 2921, International Conference on Experimental Mechanics: Advances and Applications, (20 March 1997); doi: 10.1117/12.269800
Show Author Affiliations
Vadakke Matham Murukeshan, Indian Institute of Technology (India)
A. R. Ganesan, Indian Institute of Technology (India)
Rajpal S. Sirohi, Indian Institute of Technology (India)
Sant Kumar Malhotra, Indian Institute of Technology (India)

Published in SPIE Proceedings Vol. 2921:
International Conference on Experimental Mechanics: Advances and Applications
Fook Siong Chau; C. T. Lim, Editor(s)

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