Squeeze-Film Lubrication of the Human Ankle Joint Subjected to the Cyclic Loading Encountered in Walking

[+] Author and Article Information
Miroslav Hlaváček

Institute of Theoretical and Applied Mechanics, Academy of Sciences of the Czech Republic, Prosecká 76, Prague 9, 19000, Czech Republice-mail: hlavacek@itam.cas.cz

J. Tribol 127(1), 141-148 (Feb 07, 2005) (8 pages) doi:10.1115/1.1828076 History: Received February 02, 2004; Revised June 08, 2004; Online February 07, 2005
Copyright © 2005 by ASME
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Cross section of the cylindrical model of the human ankle joint
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Variation of n(t)=J(t)/P=LtiW(t)/P, the joint force J(t) normalized to the body weight P, in the human ankle joint during walking with the step period of 1 s
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Normalized contact half-width, a(t)/ati, for NAC and AAC
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Central synovial film thickness, h(0,t), for NAC and AAC shortly after the start of walking, as well as during standing
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Normalized central hyaluronic acid concentration, ϕ(0,t)/ϕ0, for NAC and AAC shortly after the start of walking
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Qualitative distributions of W(t),h(0,t),ϕ(0,t),q(0,t) for NAC during the 26th step
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Synovial film thickness, h(t), for NAC and AAC when a long walk is broken and resumed shortly afterwards, also when standing follows
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Normalized hyaluronic acid concentration, ϕ(t)/ϕ0, for NAC and AAC when a long walk is broken and resumed shortly afterwards




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