Optimization of Material Coefficients in the Holzapfel-Gasser-Ogden Material Model for the Main Four Ligaments of the Knee Joint-A Finite Element Study

Accurate representation of soft tissue material properties plays a crucial role in computational biomechanics. Several models have been used for knee ligaments finite element (FE) studies, including the neo-Hookean model (widely used) and Holzapfel-Gasser-Ogden (HGO) (seldom used). While coefficients are available literature, limited data exists HGO model. Furthermore, no peer-reviewed comparison these two while 3D both is present literature. We mechanical from tensile test experiments literature each ligament to obtain accounting ligaments’ viscoelastic behavior. Resultant were then an Abaqus/explicit simulate bipedal landing jump. The simulations repeated with values Knee kinematics plus ACL MCL strains evaluated compared models. outputs predominantly within 1.5 standard deviations mean in-vitro data. When changed Neo-Hookean, strain higher than case, most instances, they outside experimental range (by up 11.35 SD) as well some ITR angles 2.86 SD). Reported optimized produces more realistic properties, will help improve outcomes FE accurate predictions