Time-Dependent Change of Load Sharing between Two Non-Linear Visco-Elastic Materials: Experiment and Model
Date
2006
Authors
Fuss, F.
Goh, P.
Yanai, T.
Ritchie, A.
Editors
Advisors
Journal Title
Journal ISSN
Volume Title
Type:
Conference paper
Citation
International Conference on Biomedical and Pharmaceutical Engineering (ICBPE 2006) Proceedings, 2006: pp.210-213
Statement of Responsibility
F. K. Fuss, P. K. Goh, T. Yanai and A. C. Ritchie
Conference Name
International Conference on Biomedical and Pharmaceutical Engineering (2006 : Singapore)
Abstract
Cartilage and meniscus display a non-linear viscoelasticity and the relationship between stress and strain follows a power function, as determined in this study. Furthermore, during application of a constant load to the knee, the stress in the menisci, measured with intrameniscal conductive pressure sensors, increased with time. This phenomenon was confirmed in a non-linear visco-elastic power model with 2 different materials. The material parameters for the power function were taken from the stress relaxation results of joint cartilage and meniscus. Both the experiments and the model show that load is transferred from cartilage to meniscus over time. This avoids damage to the cartilage when standing for prolonged periods.