Determination of Poisson's ratio of a beam by time-average ESPI and Euler-Bernoulli equation

作者：Kim Kyeong Suk; Chang Ho Seob; Akhter Naseem^*

来源：International Journal of Precision Engineering and Manufacturing, 2010, 11(6): 979-982.

DOI：10.1007/s12541-010-0118-9

• Laser Holography
• Laser application
• Resonance frequency
• Poisson's ratio
• Torsional vibration mode

In this research, a laser holographic technique is used to characterize the Poisson's ratio of a cantilever beam. We used the principle that one can determine the Poisson's of a material by means of its vibration characteristics which use the Euler-Bernoulli Equation to link with the specimen's natural frequency of vibration. The Poisson's ratio of the beam can be easily determined after the resonance frequencies of the bending and torsional vibration modes are measured by time-averaged electronic speckle pattern interferometry (TA-ESPI) with the advantages of non- destructive, non-contact and real-time measurement technique. The proposed technique is able to give high accurate Poisson's ratio of thin materials through a simple experimental set-up and analysis.

• 出版日期2010-12