Determination of young’s modulus of cantilever beam by digital speckle pattern interferometry |
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| Bhuvnesh Bhardwaj, Vijay Kumar Sharma |
- Abstract:
- Digital speckle pattern interferometry (DSPI) is becoming more and more popular for deformation analysis and testing due to its non-invasive nature. In the present work, out-of-plane static deformation method is used to determine Young’s modulus (E) of cantilever beam made of Aluminium. A fringe pattern corresponding to deflection of cantilever beam due to point load at its free end was recorded. To improve the measurement accuracy from the fringe pattern, a filtering scheme based on combination of median/wiener and maximum filtering is used. This filtering scheme reduces noise, improves contrast and makes the fringe pattern more distinct. The deflection calculated by using fringe count of out-of- plane static deformation method at the distance of 90.58mm from fixed end is compared with the deflection at the same distance with respect to the corresponding measured value by Mitutoyo dial gauge at the free end. It is found that the values of deflection obtained by both the methods are in good agreement. The Young’s modulus of elasticity was calculated using fringe count, load applied and dimension of the cantilever plate. The value comes to be 69.92 GPa. The Young’s modulus is also determined using UTM and is used to compare with the value calculated by out-of-plane displacement method of DSPI. The Young’s modulus calculated using DSPI and that calculated using UTM are in good agreement.
- Keywords:
- Digital speckle pattern interferometry; out-of-plane static deformation method; median/wiener and maximum filtering
- Download:
- IMEKO-TC14-2007-42.pdf
- DOI:
- -
- Event details
- IMEKO TC:
- TC14
- Event name:
- TC14 ISMQC 2007
- Title:
9th Symposium on Measurement and Quality Control in Manufacturing
- Place:
- Chennai/Madras, INDIA
- Time:
- 21 November 2007 - 24 November 2007