Modeling of human knee joint and finite element analysis of landing impact motion

Abstract

objective:Three \u00a0dimensional \u00a0digital \u00a0modeling \u00a0of \u00a0human \u00a0knee \u00a0joint \u00a0is \u00a0carried \u00a0out, \u00a0and \u00a0the mechanical behavior of knee joint in landing impact motion is analyzed by finite element method, which provides \u00a0a \u00a0reasonable \u00a0basis \u00a0for \u00a0prevention \u00a0of \u00a0knee \u00a0joint \u00a0sports \u00a0injury.Methods: \u00a0three \u00a0dimensional geometric model of knee joint was reconstructed by software Mimics;Transforming 3D geometric model into \u00a03D \u00a0finite \u00a0element \u00a0model \u00a0by \u00a03-matic \u00a0software;The \u00a0finite \u00a0element \u00a0software \u00a0ANSYS \u00a0was \u00a0used \u00a0to analyze the stress and strain of the cruciate ligament, tibial cartilage and meniscus in different impact motions.Results \u00a0and \u00a0conclusion:1. \u00a0jumping \u00a0and \u00a0landing \u00a0impact \u00a0moment, \u00a0knee \u00a0cartilage, \u00a0ligament, meniscus stress increases with the increase of the height of jumping, the tibia, the average distribution of the lateral platform landing impact load, the stress is greater than the anterior cruciate ligament posterior cruciate ligament, jumping height is 66cm, should be the force of posterior cruciate ligament in very close to the maximum, suggesting jumping height greater than 66cm in normal life or race training is easy to damage the posterior cruciate ligament.2, the posterior cruciate ligament with limited internal rotation of the femur in knee function, under the situation that internal rotation of the femur or tibia external rotation may damage the posterior cruciate ligament.