Show simple item record

dc.contributor.authorIppolito, Christina
dc.contributor.otherQueen's University (Kingston, Ont.). Theses (Queen's University (Kingston, Ont.))en
dc.date.accessioned2018-04-03T18:37:00Z
dc.date.available2018-04-03T18:37:00Z
dc.identifier.urihttp://hdl.handle.net/1974/23997
dc.description.abstractIn cases of severe arthritis, a metal-on-ultra-high molecular weight polyethylene (UHMWPE) total joint arthroplasty (TJA) is the primary solution. Wear of UHMWPE is a concern as it causes poor bearing performance and a decrease in the device’s lifespan. In this study, UHMWPE surface texturing has been proposed as a way to improve tribological conditions. Surface texturing has been studied previously under steady-state conditions, which is not representative of the harsh kinematic conditions occurring in daily living activities. Therefore, the objective of this study is to investigate the hypothesis that the proposed novel texturing approach improves tribological conditions during intermittent stop-dwell-start (SDS) motion by measuring the traction coefficient during the SDS phases. A custom waveform in a pin-on-disc friction and wear tester was created to simulate SDS loading conditions. Untextured and textured UHMWPE specimens were tested under three lubricating conditions (unlubricated, water and glycerin). Then, a method was developed to extract meaningful traction coefficient data from the SDS test results. Lastly, factors affecting the tribological conditions in the metal-UHMWPE system were investigated based on traction coefficient and wear analysis observations. The factors affecting the traction coefficient and wear were the introduction of texturing and the viscosity of the lubricant. The presence of a lubricant dominated when attempting to reduce the traction coefficient and wear. A significant reduction in traction coefficient was observed with both water and glycerin compared to unlubricated conditions in all phases of SDS motion, regardless of the surface geometry. Also, the higher the lubricant’s viscosity, the lower the traction coefficient and amount of wear. The introduction of the textured surface resulted in a significant reduction or no change in traction coefficient in the stop and start phases in the unlubricated and glycerin conditions. Also, no additional wear was observed when the surface was textured compared to untextured. Therefore, when the bearing system is properly lubricated, texturing is a promising approach to reduce traction and wear. It is therefore proposed that textured UHMWPE be further investigated as a solution to extend the lifespan on TJA.en_US
dc.language.isoenen_US
dc.relation.ispartofseriesCanadian thesesen
dc.rightsQueen's University's Thesis/Dissertation Non-Exclusive License for Deposit to QSpace and Library and Archives Canadaen
dc.rightsProQuest PhD and Master's Theses International Dissemination Agreementen
dc.rightsIntellectual Property Guidelines at Queen's Universityen
dc.rightsCopying and Preserving Your Thesisen
dc.rightsThis publication is made available by the authority of the copyright owner solely for the purpose of private study and research and may not be copied or reproduced except as permitted by the copyright laws without written authority from the copyright owner.en
dc.subjectTotal Joint Replacementen_US
dc.subjectPolyethyleneen_US
dc.subjectUHMWPEen_US
dc.subjectUHMWPE wearen_US
dc.subjectUHMWPE frictionen_US
dc.titleFactors Affecting Traction Coefficients During Intermittent Sliding Motion in Textured Metal-Polyethylene Bearingsen_US
dc.typeThesisen
dc.description.degreeMaster of Applied Scienceen_US
dc.contributor.supervisorBryant, Timothy
dc.contributor.supervisorBryant, Timothy
dc.contributor.departmentMechanical and Materials Engineeringen_US


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record