Inproceedings,
Finite Element Analysis of Femur Stress under Bending Moment and Compression Load
Proc. 2nd Int. Conf. Biomedical Engineering and Informatics BMEI '09, page 1--4. (2009)
DOI: 10.1109/BMEI.2009.5305316
Abstract
A quantitative assessment <span class='snippet'>of</span> <span class='snippet'>femur</span> <span class='snippet'>stress</span> <span class='snippet'>under</span> compression <span class='snippet'>and</span> <span class='snippet'>bending</span> condition is essential for the understanding <span class='snippet'>of</span> failure mechanisms <span class='snippet'>and</span> providing guidance for the design <span class='snippet'>and</span> operation <span class='snippet'>of</span> <span class='snippet'>femur</span> replacement. The <span class='snippet'>stress</span> distribution <span class='snippet'>of</span> <span class='snippet'>femur</span> <span class='snippet'>under</span> <span class='snippet'>bending</span> <span class='snippet'>moment</span> <span class='snippet'>and</span> compressive load is simulated using <span class='snippet'>finite</span> <span class='snippet'>element</span> method (FEM) in this paper. A two-dimensional FEM model is established according to the dimension <span class='snippet'>of</span> a typical human <span class='snippet'>femur</span>. The <span class='snippet'>bending</span> <span class='snippet'>moments</span> are obtained by shifting the load action point to the outward lateral direction. Four excursion lengths 0 mm, 5 mm, 10 mm <span class='snippet'>and</span> 15 mm are tested. The deformation <span class='snippet'>and</span> <span class='snippet'>stress</span> distribution <span class='snippet'>of</span> <span class='snippet'>femur</span>, the <span class='snippet'>stress</span> in the cross section <span class='snippet'>of</span> femoral head, neck <span class='snippet'>and</span> femoral shift <span class='snippet'>under</span> <span class='snippet'>bending</span> <span class='snippet'>moment</span> <span class='snippet'>and</span> compressive load are obtained. It can be found from the numerical results that there is obvious <span class='snippet'>stress</span> concentration at femoral neck <span class='snippet'>and</span> tension <span class='snippet'>stress</span> occurs in the outside while the compressive <span class='snippet'>stress</span> occurs in inner side. In the cross section <span class='snippet'>of</span> femoral shaft, tension <span class='snippet'>stress</span> again occurs in the outside <span class='snippet'>and</span> compressive <span class='snippet'>stress</span> occurs in inner side. The <span class='snippet'>femur</span> <span class='snippet'>stress</span> increases significantly with the <span class='snippet'>bending</span> <span class='snippet'>moment</span>.
