We used FEBio 2.9.1 to create a tibiofemoral knee model. The two models differ in the articular cartilage constituve models. The Knee_TId model uses a depth dependent transversely isotropic formulation and the Knee_FR model uses a fibril-reinforced formulation.
Alexander Paz, Gustavo A. Orozco, Petri Tanska, José J. García, Rami K. Korhonen, & Mika E. Mononen (2023). A novel knee joint model in FEBio with inhomogeneous fibril-reinforced biphasic cartilage simulating tissue mechanical responses during gait: data from the osteoarthritis initiative. Computer Methods in Biomechanics and Biomedical Engineering, 26(11), 1353-1367. DOI:
10.1080/10255842.2022.2117548
FEBio Studio Model Repository