S.H.N. Tan, J.Z. Li, C.H. Cheong, and P.V.S. Lee (Singapore)
Finite element model, human knee joint, knee kinematics
This paper presents the preliminary findings of a three dimensional finite element (FE) model of a human knee joint which is validated with in-house experimental data. The model is a flexed knee joint consisting of tibia, femur and fibula, four major ligaments (PCL, ACL, MCL and LCL) and menisci a ll represented using hexahedral elements. Finite-sliding contact algorithm was used to allow interaction between femur and menisci. Material properties of bones, menisci and ligaments are assumed linear elastic and isotropic. Experiment was performed using a human cadaveric knee specimen with intact soft tissues. The specimen was flexed at 70 degree to replicate jump-landing dynamics and its kinematics in response to anterior-posterior tibial load was measured. The computed knee kinematics agrees well with that of experiment. This preliminary study shows that the FE model has the potential to be a valuable tool for further analysis of knee function and the understanding of knee injury.
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