Flexural Vibration Test of a Beam Elastically Restrained at One End : A New Approach for Young’s Modulus Determination

A new vibration beam technique for the fast determination of the dynamic Young modulus is developed. The method is based on measuring the resonant frequency of flexural vibrations of a partially restrained rectangular beam. The strip-shaped specimen fixed at one end to a force sensor and free at the...

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Bibliographic Details
Published in:Advances in materials science and engineering 2013-01, Vol.2013 (2013), p.1-6
Main Authors: Digilov, Rafael M., Abramovich, Haim
Format: Article
Language:English
Subjects:
Cantilever beams
Fatigue (materials)
Materials science
Mathematical analysis
Modulus of elasticity
Resonant frequencies
Sensors
Vibration
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Summary:A new vibration beam technique for the fast determination of the dynamic Young modulus is developed. The method is based on measuring the resonant frequency of flexural vibrations of a partially restrained rectangular beam. The strip-shaped specimen fixed at one end to a force sensor and free at the other forms the Euler Bernoulli cantilever beam with linear and torsion spring on the fixed end. The beam is subjected to free bending vibrations by simply releasing it from a flexural position and its dynamic response detected by the force sensor is processed by FFT analysis. Identified natural frequencies are initially used in the frequency equation to find the corresponding modal numbers and then to calculate the Young modulus. The validity of the procedure was tested on a number of industrial materials by comparing the measured modulus with known values from the literature and good agreement was found.
ISSN:1687-8434
1687-8442
DOI:10.1155/2013/329530