Development of tension and compression creep models for wood using the time-temperature superposition principle

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dc.contributor.authorBond, Brian H.en
dc.contributor.committeechairLoferski, Joseph R.en
dc.contributor.committeememberFrazier, Charles E.en
dc.contributor.committeememberHolzer, Siegfried M.en
dc.contributor.departmentWood Science and Forest Productsen
dc.date.accessioned2014-03-14T21:48:30Zen
dc.date.adate2009-10-31en
dc.date.available2014-03-14T21:48:30Zen
dc.date.issued1993-06-03en
dc.date.rdate2009-10-31en
dc.date.sdate2009-10-31en
dc.description.abstractTo date there are no long-term creep models or practical methods to investigate the effect of creep on the safety and serviceability of modem wood structures and structural wood composites. Long-term creep models were developed for wood in tension and compression using the Time-Temperature Superposition Principle (TTSP). The principle states that the long-term response of a polymer at lower temperature is equivalent to the short-term response at a higher temperature. Accelerated creep tests were conducted in tension and compression using small clear specimens of Douglas-fir, southern pine and yellow-poplar. The specimens were tested at moisture contents of 6 %, 9 %, and 12 %, and at temperatures between 20°C and 80°C. The strain was measured using bonded strain gages. The individual creep compliance for each temperature was shifted along the log-time axis to obtain a "master" curve that describes the creep response of the specimens. All compliance curves also required vertical shifting. The experimental horizontal shift factors followed the Arrhenius formulation that describes the shift factor relation for polymers in the glassy region.en
dc.description.degreeMaster of Scienceen
dc.format.extentxv, 185 leavesen
dc.format.mediumBTDen
dc.format.mimetypeapplication/pdfen
dc.identifier.otheretd-10312009-020305en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-10312009-020305/en
dc.identifier.urihttp://hdl.handle.net/10919/45366en
dc.language.isoenen
dc.publisherVirginia Techen
dc.relation.haspartLD5655.V855_1993.B662.pdfen
dc.relation.isformatofOCLC# 29046669en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subject.lccLD5655.V855 1993.B662en
dc.subject.lcshCreep testing machinesen
dc.subject.lcshWood -- Creepen
dc.titleDevelopment of tension and compression creep models for wood using the time-temperature superposition principleen
dc.typeThesisen
dc.type.dcmitypeTexten
thesis.degree.disciplineWood Science and Forest Productsen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.levelmastersen
thesis.degree.nameMaster of Scienceen

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