Creating Biomechanics Modeling And Analyzing Three-dimensional Finite Element Based On The Meniscus Of Human Knee Joint

The largest and most complex joint of the human body is knee joint, which is the higher incidence. Studying knee biomechanics, analyzing the various components of the stress and load distribution, establishing knee joint model with corresponding the human body and obtaining the mechanical parameters of the real biomechanics structure, people has always been focusing on biomechanical research. Since the technique of finite element analysis has been widely used in the calculation of the field of bio-mechanics, the method has penetrated into all fields of bio-mechanics research. Many things are still an urgent need to solve the problem, such as, how to create a biomechanical model of knee with accordant anatomy and the effective analysis and accurate forecasts of its structure, how to make reliable data used in clinical treatment, medical research, bio-mechanical design applications, prosthetic design, corrective surgery and rapid prototyping, and so on. In this paper, what methods to create a completely biomechanical model of the knee joint and analytical methods to analyze, my main tasks are as following:1. Through the ADAMS software, knee joint model will be added the major muscles, ligaments and menisci to improve the perfect structure, which makes the model more realistic and reliable. Simulation of normal gait is carried out in the software, I obtained the contact force of tibia-femur, the main ligaments and muscle tension with corresponding time with meniscus or not, so reliable parameters will prepare for further finite element analysis.2. I establish the femur-tibia-fibula three-dimensional solid model of the knee through the knee CT and the medical three-dimensional reconstruction. The surface mesh is exchanged into the body mesh, the material properties is assigned to the model according to the difference of the bone composition and density, It is in accordance with the real knee.3. The model of the meniscus will be analyzed through the effect of dynamic parameters about tibial-femoral contact force with time-varying, analyzes mainly contain the dynamic stress-strain and the corresponding displacement and deformation with the meniscus in the gait cycle, Thus the actual state and the regular force of the entire knee joint model will be gained, which will be prepared for analyzing biomechanical properties of knee joint any further.