Finite Element Analysis of Stress in Femur Bone

Abstract

Finite element method (FEM) is a technique of solution of the boundary value problems. It can be explained as a numerical method for solving differential and integral equations. FEA is used to analyse the human femur bone. FEA analysis is performed on model of femur bone by varying the loads. The maximum stresses generated in this analysis. The failure stress is taken as 100 MPa. The Result indicate the failure of femur bone under the loading of certain weight under axial loading and bending load. That will clearly indicate the strength of femur bone in axial direction & during bending while average is taken. The study assumed different weights for loading similar to that of base paper 25Kg, 35Kg, 50Kg, 69Kg, 150Kg, 250Kg, 414Kg, & 500Kg. I found as weight is increasing there is more of equivalent stress generated on the bone its average is compared with the results of literature survey. Axial strength of femur is almost six times than bending. Human femur can withstand ten times the load of its body weight. In Osteoporosis when BMD decreases to the fracture threshold, an increase in the strains up to four times is the main reason of permanent failure in the joint. As per literature we can also use this study of Finite element analysis method to check the fragility of bone. So that detection of Osteoporosis might be possible easily for osteoporotic bone in future.