A new testing machine for the dynamic characterization of high strength low damping fiber materials

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dc.contributor.authorCeravolo, Rosario
dc.contributor.authorDe Marchi, Andrea
dc.contributor.authorPinotti, Elena
dc.contributor.authorSurace, Cecilia
dc.contributor.authorZanotti Fragonara, Luca
dc.date.accessioned2016-10-18T10:38:18Z
dc.date.available2016-10-18T10:38:18Z
dc.date.issued2016-09-14
dc.description.abstractThis work describes a novel method for measuring the damping, the elastic modulus and the non-linear behavior of high strength low damping fiber materials such as para-aramids, silicon carbide (SiC) and carbon. The method is based on resonant response characterization of a spring-mass system excited by a sine-wave forcing term which is applied as a vertical force to the suspended mass. The damping is obtained from the measured resonance quality factor Q, the elasticity modulus is calculated from the resonance frequency, and the non-linear coefficient is obtained with the backbone approach from resonance profile variations as a function of the forcing term amplitude. It is argued that the method is very sensitive, to the point that a maximum excitation amplitude of the order of a few percent of resistance is sufficient to obtain an estimate of the non-linear coefficient. This claim is supported by experimental results. A testing machine is also discussed, which provides the necessary sensitivity at such small excitation amplitudes and the capability of evaluating very small damping values, as expected in high strength low damping fiber materials. The sensitivity is guaranteed by an optical position sensor with sub-micron resolution. To evaluate small damping values, particular care has been taken to ensure that energy dispersions in the generator are much smaller than energy dispersions in the fibers themselves. Examples of dynamic characterization are shown for para-aramid, silicon carbide, and carbon fibers.en_UK
dc.identifier.citationRosario Ceravolo, Andrea De Marchi, Elena Pinotti, Cecilia Surace, Luca Zanotti Fragonara. A new testing machine for the dynamic characterization of high strength low damping fiber materials. Experimental Mechanics, January 2017, Volume 57, Issue 1, pp. 65–74en_UK
dc.identifier.issn0014-4851
dc.identifier.urihttp://dx.doi.org/10.1007/s11340-016-0208-4
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/10770
dc.language.isoenen_UK
dc.publisherSpringeren_UK
dc.rightsAttribution 3.0 Unported
dc.rights.urihttps://creativecommons.org/licenses/by/3.0/
dc.subjectDynamic characterizationen_UK
dc.subjectPrototyping testing machineen_UK
dc.subjectNon-linearityen_UK
dc.subjectDampingen_UK
dc.subjectPara-aramiden_UK
dc.subjectSilicon Carbideen_UK
dc.titleA new testing machine for the dynamic characterization of high strength low damping fiber materialsen_UK
dc.typeArticleen_UK

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