NDLI: Interface fixation analysis of artificial joints

Content Provider	IEEE Xplore Digital Library
Author	Shirazi-Adl, A.
Copyright Year	1983
Abstract	Implant/cement interface stresses, which affect the quality of implant fixation to the surrounding materials and therefore the long-term performance of the total joint replacement, are addressed. It is noted that previous modeling approaches result in stresses that are discontinuous at the interface between adjacent elements. Three distinct formulations that yield accurate continuous stresses as well as displacements are presented. These are a displacement-based interface element with an extra node on the interface, a penalty-modified compatible formulation, and a mixed stress-displacement formulation. Results for a tibial fixation model subjected to a nonaxisymmetric compression load are presented. The results are predicted using the penalty-based continuous stress formulation. The model has been analyzed for two types of loading conditions. One condition consists of two loaded areas, simulating a situation when the femur is exerting pressure evenly on the two tibial condyles. The second condition consists of a single loaded area simulating the loading of only one condyle. Results for the latter case are reported. The proposed formulations have performed satisfactorily in the test examples and are, therefore, considered as reliable tools to predict the interface mechanics in the total joint replacement.<>
Page Count	4
File Size	554051
Starting Page	29
Ending Page	32
File Format	PDF
ISSN	07395175
Volume Number	10
Issue Number	2
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1991-01-01
Publisher Place	U.S.A.
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Stress Bonding Equations Implants Joining materials Finite element methods Composite materials Computer interfaces Failure analysis Biological materials
Content Type	Text
Resource Type	Article
Subject	Biomedical Engineering

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