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Proceedings Paper

Measurement of elastic and thermal properties of composite materials using digital speckle pattern interferometry
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Paper Abstract

In the present work, application of digital speckle pattern interferometry (DSPI) was applied for the measurement of mechanical/elastic and thermal properties of fibre reinforced plastics (FRP). Digital speckle pattern interferometric technique was used to characterize the material constants (Poisson’s ratio and Young’s modulus) of the composite material. Poisson ratio based on plate bending and Young’s modulus based on plate vibration of material are measured by using DSPI. In addition to this, the coefficient of thermal expansion of composite material is also measured. To study the thermal strain analysis, a single DSPI fringe pattern is used to extract the phase information by using Riesz transform and the monogenic signal. The phase extraction from a single DSPI fringe pattern by using Riesz transform does not require a phase-shifting system or spatial carrier. The elastic and thermal parameters obtained from DSPI are in close agreement with the theoretical predictions available in literature.

Paper Details

Date Published: 24 August 2015
PDF: 12 pages
Proc. SPIE 9660, SPECKLE 2015: VI International Conference on Speckle Metrology, 966011 (24 August 2015); doi: 10.1117/12.2196390
Show Author Affiliations
Manoj Kumar, Indian Institute of Technology Delhi (India)
Gufran Sayeed Khan, Indian Institute of Technology Delhi (India)
Chandra Shakher, Indian Institute of Technology Delhi (India)

Published in SPIE Proceedings Vol. 9660:
SPECKLE 2015: VI International Conference on Speckle Metrology
Fernando Mendoza Santoyo; Eugenio R. Mendez, Editor(s)

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