Bond formation between polymer filaments in fused deposition modeling process

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dc.contributor.advisorBellehumeur, Celine
dc.contributor.authorSun, Qian
dc.date.accessioned2005-08-16T17:27:22Z
dc.date.available2005-08-16T17:27:22Z
dc.date.issued2005
dc.descriptionBibliography: p. 107-121en
dc.description.abstractThis research investigates the bond formation among extruded acrylonitrile butadiene styrene filaments in the fused deposition modeling (FDM) process. This phenomenon is thermally driven and ultimately determines the integrity and mechanical properties of the resultant prototypes. The bond quality was assessed in terms of changes in the mesostructure and the degree of healing achieved at the interfaces between the adjoining polymer filaments. Experimental measurements of the temperature profiles were carried out for specimens produced under different processing conditions. The effects of processing conditions on the mesostructures and mechanical properties (flexural strength) were also examined. Our results showed that the fabrication strategy, the envelope temperature and variations in the convection coefficient have strong effects on the cooling temperature profile, as well as on the mesostructure and the bond strength achieved between filaments. Parallel to the experimental work, predictions of the degree of bonding achieved during the filament deposition process were made based on a thermal analysis of extruded polymer filaments. The bond development between filaments was modeled using a Newtonian sintering and a non-isothermal molecular diffusion models. The sintering phenomenon was found to have a significant effect on bond formation, but only for the very short duration when the filament's temperature is above the critical sintering temperature. Otherwise, creep deformation was found to dominate changes in the mesostructure. The non-isothermal molecular diffusion model predictions were found to be very sensitive to changes in the temperature and estimated values for the welding time. Further work on the thermal analysis as well as for obtaining the welding time is needed to give accurate predictions of the degree of healing and bond strength achieved between polymer filaments that constitute FDM parts.en
dc.format.extentxix, 133 leaves : ill. ; 30 cm.en
dc.identifier.citationSun, Q. (2005). Bond formation between polymer filaments in fused deposition modeling process (Master's thesis, University of Calgary, Calgary, Canada). Retrieved from https://prism.ucalgary.ca. doi:10.11575/PRISM/22992en_US
dc.identifier.doihttp://dx.doi.org/10.11575/PRISM/22992
dc.identifier.urihttp://hdl.handle.net/1880/42034
dc.language.isoeng
dc.publisher.institutionUniversity of Calgaryen
dc.publisher.placeCalgaryen
dc.rightsUniversity of Calgary graduate students retain copyright ownership and moral rights for their thesis. You may use this material in any way that is permitted by the Copyright Act or through licensing that has been assigned to the document. For uses that are not allowable under copyright legislation or licensing, you are required to seek permission.
dc.titleBond formation between polymer filaments in fused deposition modeling process
dc.typemaster thesis
thesis.degree.disciplineChemical and Petroleum Engineering
thesis.degree.grantorUniversity of Calgary
thesis.degree.nameMaster of Science (MSc)
ucalgary.item.requestcopytrue
ucalgary.thesis.accessionTheses Collection 58.002:Box 1612 520492129
ucalgary.thesis.notesUARCen
ucalgary.thesis.uarcreleaseyen
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