Show simple item record

dc.contributor.authorSchultz, Marc Roberten_US
dc.date.accessioned2014-03-14T20:47:28Z
dc.date.available2014-03-14T20:47:28Z
dc.date.issued1998-11-11en_US
dc.identifier.otheretd-110498-114727en_US
dc.identifier.urihttp://hdl.handle.net/10919/35597
dc.description.abstractThe energy absorption capacity of a series of axially crushed composite tubes fabricated from high tow count graphite fiber is compared with those of similar tubes fabricated from aerospace-grade fiber to determine the viability of considering the use of such fibers in automotive applications. To that end, graphite-epoxy tubular specimens with circular and square cross-sectional geometries; stacking sequences with ±45° fibers and with both ±45° and 0° fibers; and two different fiber types were fabricated and crushed both statically and dynamically to examine the energy absorption characteristics. The fiber types, in the form of preimpregnated tow (towpreg) from Thiokol, were Akzo Fortafil 50k fiber and aerospace-grade T300 12k fiber. Using the towpreg, sixteen tubes were filament wound on aluminum mandrels. Three specimens were cut from each of these tubes for a total of forty-eight specimens. Twenty-four of these specimens were crushed statically in a load frame and twenty-four were crushed dynamically in a drop fixture. In order to characterize the tubes and specimens, a number of measurements were taken. These measurements included length, wall thickness, cross-sectional dimensions, volume, and mass. Two important energy absorption measures were examined: the specific energy absorption (SEA) and the ratio of the peak load to the average load. The geometry had a significant effect on the energy absorption but the stacking sequence did not. It was also found that the 50k material was less effective at absorbing energy than the 12k material, but the 50k still may be acceptable.en_US
dc.publisherVirginia Techen_US
dc.relation.haspartThesis.pdfen_US
dc.rightsI hereby grant to Virginia Tech or its agents the right to archive and to make available my thesis or dissertation in whole or in part in the University Libraries in all forms of media, now or hereafter known. I retain all proprietary rights, such as patent rights. I also retain the right to use in future works (such as articles or books) all or part of this thesis or dissertation.en_US
dc.subjectstaticen_US
dc.subjectdynamicen_US
dc.subjectlow-costen_US
dc.subjectfilament windingen_US
dc.subjecttowpregen_US
dc.subject12ken_US
dc.subject50ken_US
dc.titleEnergy Absorption Capacity of Graphite-Epoxy Composite Tubesen_US
dc.typeThesisen_US
dc.contributor.departmentEngineering Mechanicsen_US
dc.description.degreeMaster of Scienceen_US
thesis.degree.nameMaster of Scienceen_US
thesis.degree.levelmastersen_US
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen_US
thesis.degree.disciplineEngineering Mechanicsen_US
dc.contributor.committeechairHyer, Michael W.en_US
dc.contributor.committeememberLesko, John Jacken_US
dc.contributor.committeememberLoos, Alfred C.en_US
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-110498-114727/en_US
dc.date.sdate1998-12-05en_US
dc.date.rdate1999-08-11
dc.date.adate1998-08-11en_US


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record