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Characterization and Lifetime Performance Modeling of Acrylic Foam Tape for Structural Glazing Applications

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dc.contributor.authorTownsend, Benjamin Williamen
dc.contributor.committeecochairDillard, David A.en
dc.contributor.committeecochairPlaut, Raymond H.en
dc.contributor.committeememberOhanehi, Donatus C.en
dc.contributor.departmentCivil Engineeringen
dc.date.accessioned2014-03-14T20:46:11Zen
dc.date.adate2008-10-13en
dc.date.available2014-03-14T20:46:11Zen
dc.date.issued2008-09-12en
dc.date.rdate2008-10-13en
dc.date.sdate2008-09-29en
dc.description.abstractThis thesis presents the results of testing and modeling conducted to characterize the performance of 3M™ VHB™ structural glazing tape in both shear and tension. Creep rupture testing results provided the failure time at a given static load and temperature, and ramp-to-fail testing results provided the ultimate load resistance at a given rate of strain and temperature. Parallel testing was conducted on three structural silicone sealants to compare performance. Using the time temperature superposition principle, master curves of VHB tape storage and loss moduli in shear and tension were developed with data from a dynamic mechanical analyzer (DMA). The thermal shift factors obtained from these constitutive tests were successfully applied to the creep rupture and ramp-to-fail data collected at 23°C, 40°C, and 60°C (73°F, 104°F, and 140°F), resulting in master curves of ramp-to-fail strength and creep rupture durability in shear and tension. A simple linear damage accumulation model was then proposed to examine the accumulation of wind damage if VHB tape is used to attach curtain wall glazing panels to building facades. The purpose of the model was to investigate the magnitude of damage resulting from the accumulation of sustained wind speeds that are less than the peak design wind speed. The model used the equation derived from tensile creep rupture testing, extrapolated into the range of stresses that would typically be generated by wind loading. This equation was applied to each individual entry in the data files of several real wind speed histories, and the fractions of life used at each entry were combined into a total percentage of life used. Although the model did not provide evidence that the established design procedure is unsafe, it suggested that the accumulation of damage from wind speeds below the peak wind speed could cause a VHB tape mode of failure that merits examination along with the more traditional peak wind speed design procedure currently recommended by the vendor.en
dc.description.degreeMaster of Scienceen
dc.identifier.otheretd-09292008-105118en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-09292008-105118/en
dc.identifier.urihttp://hdl.handle.net/10919/35233en
dc.publisherVirginia Techen
dc.relation.haspartB_Townsend_Thesis_2008.pdfen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectWind Loadingen
dc.subjectLinear Damage Accumulation Modelen
dc.subjectTime Temperature Superposition Principleen
dc.subjectCreep Ruptureen
dc.subjectVHB Acrylic Tapeen
dc.titleCharacterization and Lifetime Performance Modeling of Acrylic Foam Tape for Structural Glazing Applicationsen
dc.typeThesisen
thesis.degree.disciplineCivil Engineeringen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.levelmastersen
thesis.degree.nameMaster of Scienceen

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