ABSTRACT
Contacts exist around biology, especially in joints. Contacts are separated into three categories based on their behavior: standard contact, always bonded, and multipoint constraint (MPC). Accordingly, in the first part of the chapter, a three-dimensional (3D) finite element model of knee contact was studied; the six contact pairs were separated into the three categories and modeled individually, with various contact key options. After solution, the contact pressures of the contact pairs look reasonable, which partially validates the built model. In the second part of the chapter, a two-dimensional (2D), axisymmetrical finite element model of the knee was built; the soft tissues were modeled by coupled pore-pressure thermal (CPT) elements. The computational results indicate that the porous pressures and the contact pressures change with time.
