ANALISIS KONTAK ANTARA KOMPONEN TIBIAL DAN FEMORAL DARI PASANGAN MATERIAL UNTUK SENDI LUTUT TIRUAN DENGAN METODE ELEMEN HINGGA

Material that are widely used for femoral and tibial components in artificial knee replacement is CoCr, while UHMWPE is used as a bearing material. From the results of failure analysis on artificial knee joint replacement among others caused by: wearness of UHMWPE, fractures of the implant components, osteolysis caused by UHMWPE wear particles. Therefore, the strength of the implant is needed and should be analyzed in order to avoid failure after surgery. So that the optimal design of artificial knee joints are really needed. The research was conducted by performing 2D modeling elament for artificial knee joint. Any variation of the curvature will be simulated with a load variation, which is in a squatting position, get up from a chair, walking, and the position up or down stairs. Simulation output of the maximum shear stress distribution will be studied for each load and the diameter of the curvature variation. UHMWPE yields tress is 20 MPa. From load variations in anterior/posterior, was found that for diameter of the indenter 23 mm maximum load before yield is 48.62 N/mm and 26 mm and 24.5 is 51.02 and 53.42 N / mm respectively. For diameter indenter in medial/lateral, maximum load for 15, 16.5, and 18 mm are 33.35, 36.65, and 38.30 N/mm respectively. For diameter variation of indenter in anterior /posterior, load 79.8 N/mm caused Tresca passed yield stress . For diameter variations in medial/lateral yield occurs at load 54.8 N/mm for all sizes of diameter