The Study and analysis of Stress Distribution Subjected on the Replacement Knee Joint Components Using Photo-Elasticity and Numerical Methods

The failure of a knee joint can cause serious health problems and usually leads to the replacement of the joint surgically. The distribution of stresses in the region of the joint shall be computed and analysed via photo-elasticity method and numerically with the use of ANSYS workbench. Numerical stresses will be measured and estimated for ground, air sneakers and ground air sneakers with silicon damped cases and compared with the case of without using damped sneakers. The patient is of age 56 years, weight 85 kg, height 165 cm and leg length of 98 cm. The contours of the distributed stresses via the use of both the numerical and photo-elasticity methods showed that the sneakers with ground, air with silicon damping had minimum stress values (34.71 F& 43,99) MPa for the numerical and photo-elasticity methods respectively. Also, both methods predicted that damped sneakers were safe to use while the maximum safety factor was recorded when using ground, air sneakers with a value of 30.98 and 30.58 for femoral component, while for tibia component with a value of 17.61 and 18.27, while for articulating surface with a value of 8.63 and 15.94for numerical and photo-elasticity methods respectively.