Response Analysis of Passive Human Knee Joint in Flexion Under Anterior-Posterior Loads

K. Moglo, A. Shirazi-Adl
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Abstract

The human knee joint is a multi-body complex system that experiences relatively large loads and displacements during normal daily activities. The joint stability is provided by its articular surfaces, menisci, ligaments and muscles. An injury to a component is expected to influence the joint normal kinematics/kinetics with liklihood to initiate/accelerate joint instability and degeneration. In this work, a validated nonlinear 3-D model of the human knee joint [1,2] is further refined and applied to the analysis of the tibiofemoral joint in passive flexion under 100N anterior or posterior horizontal preload. Attention is focused on the global (primary and coupled) motions, ligament forces and load transmission via articular surfaces. The effect of ligament initial strain on the response is also investigated.
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前后载荷作用下被动屈曲膝关节的响应分析
人类膝关节是一个多体复杂系统,在日常活动中承受较大的负荷和位移。关节的稳定性由关节面、半月板、韧带和肌肉提供。一个部件的损伤预计会影响关节的正常运动学/动力学,有可能引发/加速关节不稳定和退变。在这项工作中,我们进一步完善了一个经过验证的人体膝关节非线性三维模型[1,2],并将其应用于100N前后水平预载荷下被动屈曲的胫股关节分析。注意力集中在全局(主要和耦合)运动,韧带力和载荷传递通过关节表面。研究了韧带初始应变对响应的影响。
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