Method for determining damping properties of materials using a suspended mechanical oscillator. (9th June 2018)

• Record Type: Journal Article
• Authors: Biscans, S.; Gras, S.; Evans, M.; Fritschel, P.; Pezerat, C.; Picart, P.
• Is Part Of: Journal of sound and vibration. Volume 423(2018)
• Page Start: 118
• Page End: 125
• Publication Date: 2018-06-09
• Subjects: Damping -- Loss -- Materials -- Epoxy; Sound -- Periodicals; Vibration -- Periodicals; Son -- Périodiques; Vibration -- Périodiques; Sound; Vibration; Periodicals; Electronic journals; 620.205
• DOI: 10.1016/j.jsv.2018.02.061
• Languages: English
• ISSNs: 0022-460X

Abstract

Abstract: We present a new approach for characterizing the loss factor of materials, using a suspended mechanical oscillator. Compared to more standard techniques, this method offers freedom in terms of the size and shape of the tested samples. Using a finite element model and the vibration measurements, the loss factor is deduced from the oscillator's ring-down. In this way the loss factor can be estimated independently for shear and compression deformation of the sample over a range of frequencies. As a proof of concept, we present measurements for EPO-TEK 353ND epoxy samples.