Degenerative arthritis is a disease that affects the line cartilage of the knee joint. It causes severe pain in the joint and may require a replacement surgery of the affected knee with artificial components. The aim of this research was to study the distribution of contact stresses in prosthetic knee joints made out of polyethylene chopped carbon fibre composite and conventional polyethylene. Commercially available software (ANSYS 8.1) was used in numerical experiments. The effect of the sagittal radius, flexion angles and external load on stresses in the joint were investigated in numerical experiments. Results showed lower contact stresses in the tibial part of the polyethylene chopped carbon fibre composite artificial joint compared to the tibia made out of polyethylene.

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The aim of this research was to study the distribution of contact stresses in prosthetic knee joint made up of polyethylene material. Commercially available software ANSYS 18.1 used in numerical experimental. The effect of the sagittal radius, flexion angle and external load on stresses in the knee joint were investigated in numerical experiments. The compare results for experimental method and FEA method. So Overall, this investigation gives a rule to creation of prosthetic knee joint at sensible expense with better arrangement of sagittal radius and flexion angle to withstand the loads under different circumstances.

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