THE DYNAMIC CHARACTERIZATION OF IMPACT-MITIGATING MATERIALS USING ELECTROMAGNETIC VELOCITY GAUGES

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dc.contributor.advisorFourney, William Len_US
dc.contributor.authorWiles, Garrett Scotten_US
dc.contributor.departmentMechanical Engineeringen_US
dc.contributor.publisherDigital Repository at the University of Marylanden_US
dc.contributor.publisherUniversity of Maryland (College Park, Md.)en_US
dc.date.accessioned2020-07-14T05:30:19Z
dc.date.available2020-07-14T05:30:19Z
dc.date.issued2020en_US
dc.description.abstractThe use of certain polymers is actively being examined as means to passively reduce the damaging effects of impact loading. With uncertainty of the dynamic environments in which these materials achieve optimal performance, a further investigation is necessary to analyze the dynamic behavior of the viscoelastic material as loading rate varies. This study was conducted using a polymeric Split-Hopkinson pressure bar while using electromagnetic velocity gauges for measuring stress-strain data to obtain material characteristics of the test specimens. Frequency domain characteristics were obtained by fitting a rheological model to test data. Strain-rates observed during the study were on the order of 10^3 1/s. A polymeric Split-Hopkinson pressure bar was used instead of a conventional elastic bar to reduce the impedance mismatch with the test specimens. Electromagnetic velocity gauges were employed to justifiably neglect the dispersion and attenuation effects that accompany the use of viscoelastic bars.en_US
dc.identifierhttps://doi.org/10.13016/5tzo-a6p5
dc.identifier.urihttp://hdl.handle.net/1903/26269
dc.language.isoenen_US
dc.subject.pqcontrolledMechanical engineeringen_US
dc.subject.pqcontrolledMaterials Scienceen_US
dc.subject.pqcontrolledEngineeringen_US
dc.subject.pquncontrolleddynamic characterizationen_US
dc.subject.pquncontrolledfrequency domain characterizationen_US
dc.subject.pquncontrolledgeneralized Maxwell modelen_US
dc.subject.pquncontrolledSplit-Hopkinson pressure baren_US
dc.subject.pquncontrolledvelocity gaugesen_US
dc.subject.pquncontrolledviscoelasticen_US
dc.titleTHE DYNAMIC CHARACTERIZATION OF IMPACT-MITIGATING MATERIALS USING ELECTROMAGNETIC VELOCITY GAUGESen_US
dc.typeThesisen_US

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