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A numerical approach to evaluate the fatigue life of monolimb

Chen, Nian-Zhong, Lee, Winson C.C., & Zhang, Ming (2006) A numerical approach to evaluate the fatigue life of monolimb. Medical Engineering and Physics, 28(3), pp. 290-296.

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Abstract

Monolimb refers to a transtibial prosthesis with the prosthetic socket and the shank being molded into one piece of thermoplastic material. Shank flexibility of a monolimb can improve gait and comfort. However, fatigue failure of monolimbs under cyclic walking load is an important concern. This study is to evaluate the fatigue life of a monolimb designed for a transtibial amputee, based on finite element analysis, the statistical Miner's rule and reliability analysis. Stress uncertainty due to modeling error and the scatter in fatigue test data were considered. Results indicated that the accuracy of fatigue life evaluation of monolimb depends significantly on the precision of stress estimation. In addition, relationship between fatigue failure probability and the number of walking steps was suggested providing a reference for clinicians to determine the interval of the inspection for the monolimb.

Impact and interest:

5 citations in Scopus
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5 citations in Web of Science®

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570 since deposited on 08 May 2006
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ID Code: 4068
Item Type: Journal Article
DOI: 10.1016/j.medengphy.2005.07.002
ISSN: 1350-4533
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > BIOMEDICAL ENGINEERING (090300) > Rehabilitation Engineering (090305)
Divisions: Past > QUT Faculties & Divisions > Faculty of Built Environment and Engineering
Copyright Owner: Copyright 2006 Elsevier
Copyright Statement: Reproduced in accordance with the copyright policy of the publisher.
Deposited On: 08 May 2006
Last Modified: 11 Aug 2011 04:37

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