eprintid: 8182 rev_number: 5 userid: 6 dir: disk0/00/00/81/82 datestamp: 2011-11-10 19:48:31 lastmod: 2016-11-15 13:45:01 status_changed: 2011-11-10 19:48:31 type: thesis_degree metadata_visibility: show contact_email: hsl16@pitt.edu, hsinyipt86@gmail.com item_issues_id: similar_title_15645 item_issues_id: similar_title_15820 item_issues_type: similar_title item_issues_type: similar_title item_issues_description: Similar title to Liu, HY and Cooper, RA and Pearlman, J and Cooper, R and Connor, S (2008) Evaluation of titanium ultralight manual wheelchairs using ANSI/RESNA standards. Journal of Rehabilitation Research and Development, 45 (9). 1251 - 1268. ISSN 0748-7711 item_issues_description: Similar title to Liu, Hsin-yi and Cooper, Rory A and Pearlman, Jonathan Lee and Cooper, Rosemarie and Connor, Samuel (2008) Evaluation of titanium ultralight manual wheelchairs using ANSI/ RESNA standards. Journal of rehabilitation research and development, 45 (9). pp. 1251-67. ISSN 1938-1352 item_issues_timestamp: 2012-10-06 06:07:19 item_issues_timestamp: 2012-10-11 06:07:36 item_issues_status: discovered item_issues_status: autoresolved item_issues_count: 1 eprint_status: archive creators_name: Liu, Hsin Yi creators_email: hsl16@pitt.edu, hsinyipt86@gmail.com creators_id: HSL16 title: EVALUATION OF TITANIUM ULTRALIGHT MANUAL WHEELCHAIRS USING ANSI/RESNA STANDARDS ispublished: unpub divisions: sch_hrs_healthandrehabsciences full_text_status: public keywords: durability; failure; fatigue tests; reference standards; wheelchair abstract: A series of commercially available titanium ultralight wheelchairs were tested using ANSI/RESNA testing procedures, and their durability was compared with previously tested aluminum ultralight wheelchairs and light-weight wheelchairs. Three of each of the following titanium wheelchairs were tested: Invacare-TopEnd, Invacare-A4, Quickie-Ti, and TiLite-ZRA. The Quickie-Ti wheelchairs had the most forward and rearward center of gravity adjustability. All of the titanium wheelchairs passed the forward braking effectiveness test, but two chairs of each model tipped backward before the platform inclining to 7 degree in the rearward braking effectiveness test. All titanium wheelchairs passed the impact strength tests, but two failed in the static strength tests: two Invacare-TopEnd wheelchairs and one Invacare-A4 wheelchair failed due to deformation of the armrest mounting plates, and the handgrips of the TiLite-ZRA wheelchairs slid off the push handles. Two Invacare-A4 and one Invacare-TopEnd successfully completed the double drum and curb drop tests, but the remaining 9 wheelchairs failed prematurely. No significant differences were found in the number of the equivalent cycles or the value among the four models. The titanium ultralight wheelchairs had less equivalent cycles and value than the aluminum ultralight wheelchairs that were tested in a previous study. The failure modes in the static strength tests and the fatigue tests were consistent within the model, and revealed important design issues for each model. Our results suggest that manufacturers need to perform more careful analyses before commercializing new products. date: 2008-09-08 date_type: completed institution: University of Pittsburgh refereed: TRUE etdcommittee_type: committee_chair etdcommittee_type: committee_member etdcommittee_type: committee_member etdcommittee_name: Cooper, Rory A. etdcommittee_name: Pearlman, Jon etdcommittee_name: Cooper, Rosemarie etdcommittee_email: rcooper@pitt.edu etdcommittee_email: jlp46@pitt.edu etdcommittee_email: cooperrm@pitt.edu etdcommittee_id: RCOOPER etdcommittee_id: JLP46 etdcommittee_id: COOPERRM etd_defense_date: 2008-03-20 etd_approval_date: 2008-09-08 etd_submission_date: 2008-06-24 etd_access_restriction: 5_year etd_patent_pending: FALSE assigned_doi: doi:10.5195/pitt.etd.2011.8182 thesis_type: thesis degree: MS committee: Rory A. Cooper (rcooper@pitt.edu) - Committee Chair committee: Jon Pearlman (jlp46@pitt.edu) - Committee Member committee: Rosemarie Cooper (cooperrm@pitt.edu) - Committee Member etdurn: etd-06242008-115100 other_id: http://etd.library.pitt.edu/ETD/available/etd-06242008-115100/ other_id: etd-06242008-115100 citation: Liu, Hsin Yi (2008) EVALUATION OF TITANIUM ULTRALIGHT MANUAL WHEELCHAIRS USING ANSI/RESNA STANDARDS. Master's Thesis, University of Pittsburgh. (Unpublished) document_url: http://d-scholarship-dev.library.pitt.edu/8182/1/Thesis_Hsinyi_Liu_EVALUATION_OF_TITANIUM_ULTRALIGHT_MANUAL_WHEELCHAIRS_USING_ANSIRESNA_STANDARDS.pdf