Study on Loading Rate-Dependent Property of Different Layers in Articular Cartilage Based on ABAQUS

A new biomechanical model of articular cartilage was developed using ABAQUS to investigate the mechanical properties of different layers under different loading rates. It is found that the compressive strain of superficial layer is the largest, the compressive strain of deep layer is the smallest and the compressive strain of middle layer is between the superficial and deep layer under constant loading rate. The compressive strains of different layers increase with increasing loading rates. At the beginning of loading, fluid flows mainly in the superficial layer and flows into the middle and deep layer with the increasing time and the position of the maximum flow moves downward. Void ratio also increases with the loading time.