In this paper, an experimental test method to accurately measure the complex dynamic elastic modulus of soft materials designed for anti-vibration purposes over a wide frequency range with high resolution at low uncer-tainty levels is proposed and applied to six polymeric soft materials. The proposed experimental technique, based on standardized test set-up and laser-Doppler velocimetry, is conceived to provide the uniaxial dynamic modulus of these materials on the basis of the exact solution of the Newton's second law differential equation of a free loading-mass supported by a spring-damper system and subjected to an underlying dynamic stress. After a preliminary characterization with different standard procedures, the dynamic elastic modulus and damping properties of the six materials are investigated over a frequency range of 25-1000 Hz. The overall expanded uncertainty, on average around 3 %, is determined from five repeated measurements including the instrumental uncertainty. Results are compared with the standard ones.

Experimental determination of the dynamic elastic modulus of polymeric soft materials in an extended frequency range: A supported free loading-mass method / Prato, A; Romeo, R; Cuccaro, R; Schiavi, A. - In: MEASUREMENT. - ISSN 0263-2241. - 199:(2022), p. 111587. [10.1016/j.measurement.2022.111587]

Experimental determination of the dynamic elastic modulus of polymeric soft materials in an extended frequency range: A supported free loading-mass method

Prato, A
;
Romeo, R;Cuccaro, R;Schiavi, A
2022

Abstract

In this paper, an experimental test method to accurately measure the complex dynamic elastic modulus of soft materials designed for anti-vibration purposes over a wide frequency range with high resolution at low uncer-tainty levels is proposed and applied to six polymeric soft materials. The proposed experimental technique, based on standardized test set-up and laser-Doppler velocimetry, is conceived to provide the uniaxial dynamic modulus of these materials on the basis of the exact solution of the Newton's second law differential equation of a free loading-mass supported by a spring-damper system and subjected to an underlying dynamic stress. After a preliminary characterization with different standard procedures, the dynamic elastic modulus and damping properties of the six materials are investigated over a frequency range of 25-1000 Hz. The overall expanded uncertainty, on average around 3 %, is determined from five repeated measurements including the instrumental uncertainty. Results are compared with the standard ones.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11696/74900
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