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dc.contributor.advisorLuhrs, Claudia
dc.contributor.authorDominguez, Charliean
dc.dateJune 2016
dc.date.accessioned2018-02-05T18:20:15Z
dc.date.available2018-02-05T18:20:15Z
dc.date.issued2016-06
dc.identifier.urihttp://hdl.handle.net/10945/56713
dc.description.abstractThe objective of this thesis was to engineer multifunctional nanostructures, based on carbon nanofiber foams (CNFF), to improve their energy absorption. To attain the goal, experimental research was conducted that combined the CNFF with a) commercial carbon frameworks and b) silica nanoparticles or fumed silica, dispersed on ethylene glycol, forming shear-thickening fluids (STF). The latter were used to fabricate core-shell structures in which the CNFF-STF served as a core and epoxy resin was used as the shell. The individual nanofibers were characterized by scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) methods while the STF rheology was examined as a function of the strain rate. The mechanical properties of the CNFF-STF specimens and the core-shell composites were determined through cyclic compression and hardness measurements/impact tests, respectively. It was found that the CNFF/commercial frameworks combination generated structures that were too brittle for the desired application. However, the combination of CNFF-STF encased by an epoxy layer resulted in core-shell structures with significant improvements in energy absorption, up to 140% higher when compared to bare epoxy and 33% better when compared to CNFF/epoxy.en_US
dc.description.urihttp://archive.org/details/developmentofene1094556713
dc.publisherMonterey, California: Naval Postgraduate Schoolen_US
dc.rightsThis publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.en_US
dc.titleDevelopment of energy absorption structures based on carbon nanofiber foams and shear thickening fluidsen_US
dc.typeThesisen_US
dc.contributor.secondreaderHobson, Garth
dc.contributor.departmentMechanical and Aerospace Engineering (MAE)en_US
dc.subject.authorCarbon nanofiber foam fabricationen_US
dc.subject.authorshear thickening fluidsen_US
dc.subject.authorrheologyen_US
dc.subject.authorstrengtheningen_US
dc.subject.authorenergyen_US
dc.subject.authorabsorptionen_US
dc.subject.authormechanical testing and characterization methodsen_US
dc.description.serviceLieutenant, United States Navyen_US
etd.thesisdegree.nameMaster of Science in Mechanical Engineeringen_US
etd.thesisdegree.levelMastersen_US
etd.thesisdegree.disciplineMechanical Engineeringen_US
etd.thesisdegree.grantorNaval Postgraduate Schoolen_US
dc.description.distributionstatementApproved for public release; distribution is unlimited.


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