Title page for ETD etd-08062001-153737

Type of Document Master's Thesis
Author Thompson, Matthew Thomas
URN etd-08062001-153737
Title Design of a Cyclic Sliding, Dynamically Loaded Wear Testing Device for the Evaluation of Total Knee Replacement Materials
Degree Master of Science
Department Mechanical Engineering
Advisory Committee
Advisor Name Title
Foy, Jonette Rogers Committee Co-Chair
Reinholtz, Charles F. Committee Co-Chair
Robertshaw, Harry H. Committee Member
  • UHMWPE wear
  • wear testing device
  • total knee replacements
  • knee simulator
Date of Defense 2001-07-30
Availability unrestricted
During normal walking, the relative motion of the human knee involves flexion/extension, anterior/posterior sliding, and medial/lateral rotation. As well, the knee experiences a complex, dynamic loading curve with a peak of up to seven times body weight. However, most wear testing machines that have been used to evaluate total knee replacement materials are unidirectional and/or apply only static force. This thesis presents an alternate wear testing device capable of simulating the most prevalent motions of the knee, and applying physiologically-correct loading to the material interface. By incorporating a CoCr disc, an UHMWPE block, stepping motors, pneumatic components, computer control, and linear tables in an x-y configuration, the device is capable of quickly screening new and alternative materials to UHMWPE before evaluating them on a much more expensive knee simulator. In addition, flexibility of the device allows programming of many different motion and loading configurations permitting materials testing under only certain circumstances, or evaluating the effects on wear of specific motions. Design rationale, development, validation, and future recommendations are presented.
  Filename       Size       Approximate Download Time (Hours:Minutes:Seconds) 
 28.8 Modem   56K Modem   ISDN (64 Kb)   ISDN (128 Kb)   Higher-speed Access 
  01-opening.pdf 111.29 Kb 00:00:30 00:00:15 00:00:13 00:00:06 < 00:00:01
  02-chapter1.pdf 73.97 Kb 00:00:20 00:00:10 00:00:09 00:00:04 < 00:00:01
  03-chapter2.pdf 1.39 Mb 00:06:26 00:03:19 00:02:54 00:01:27 00:00:07
  04-chapter3.pdf 3.15 Mb 00:14:34 00:07:29 00:06:33 00:03:16 00:00:16
  05-chapter4.pdf 978.65 Kb 00:04:31 00:02:19 00:02:02 00:01:01 00:00:05
  06-chapter5.pdf 219.86 Kb 00:01:01 00:00:31 00:00:27 00:00:13 00:00:01
  07-chapter6.pdf 101.94 Kb 00:00:28 00:00:14 00:00:12 00:00:06 < 00:00:01
  08-appendices.pdf 3.21 Mb 00:14:50 00:07:37 00:06:40 00:03:20 00:00:17

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