Pedestrian Knee Joint Modeling and Viscoelastic Material Parameters Identification for Ligaments

In order to study the injury mechanisms and injury criterion, a FE model of pedestrian knee joint was modeled by human anatomical structure with ligaments MCL, LCL, ACL and PCL, capsules, meniscus and articular cartilage included. To reflect the viscoelastic characteristic of knee ligaments, linear viscoelasticity was chosen as the material model for knee ligaments. The viscoelastic material parameters such as long-term and short-term shear modulus were identificated by biomechanical experiments of knee ligaments. The comparison between the results of simulation and experiment under different strain rates indicated that the knee ligaments models with viscoelastic material could accurately simulate the biomechanical response of knee ligaments.