Characterization and Response of Thermoplastic Composites and Constituents

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dc.contributor.authorUmberger, Pierce Daviden
dc.contributor.committeechairCase, Scott W.en
dc.contributor.committeememberBatra, Romesh C.en
dc.contributor.committeememberHyer, Michael W.en
dc.contributor.departmentEngineering Science and Mechanicsen
dc.date.accessioned2014-03-14T20:40:00Zen
dc.date.adate2010-06-22en
dc.date.available2014-03-14T20:40:00Zen
dc.date.issued2010-06-01en
dc.date.rdate2010-06-22en
dc.date.sdate2010-06-14en
dc.description.abstractThe research presented herein is an effort to support computational modeling of ultra-high molecular weight polyethylene (UHMWPE) composites. An effort is made to characterize the composites and their constituents. UHMWPE, as a polymer, is time and temperature dependent. Using time-temperature superposition (tTSP), the constituent properties are studied as a function of strain rate. Properties that are believed to be significant are fiber tensile properties as a function of strain rate, as well as the through-thickness shear behavior of composite laminates. Obtaining fiber properties proved to be a challenge. The high strength and low surface energy of the fibers makes gripping specimens difficult. Several different methods of fixturing and gripping are investigated, eventually leading to a combination of friction and adhesion approaches where a fiber was wrapped on an adhesive coated cardboard mandrel and then gripped in the test fixture. Fiber strength is estimated using tTSP to equivalent strain rates approaching 10^6 sec^-1. Punch-shear testing of UHMWPE laminates is conducted at quasi-static strain rates and the dependence of the results on thickness and test geometry is investigated.en
dc.description.degreeMaster of Scienceen
dc.identifier.otheretd-06142010-095241en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-06142010-095241/en
dc.identifier.urihttp://hdl.handle.net/10919/33574en
dc.publisherVirginia Techen
dc.relation.haspartUmberger_PD_T_2010_Copyright.pdfen
dc.relation.haspartUmberger_PD_T_2010.pdfen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectUHMWPEen
dc.subjectTime-temperature superpositionen
dc.subjectcomposite materialsen
dc.titleCharacterization and Response of Thermoplastic Composites and Constituentsen
dc.typeThesisen
thesis.degree.disciplineEngineering Science and Mechanicsen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.levelmastersen
thesis.degree.nameMaster of Scienceen

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