Computer aided stress analysis of long bones utilizing computed tomography.
A computer aided analysis method has been developed which utilizes computed tomography (CT) and a finite element (FE) computer program to determine the stress-displacement pattern in a long bone section. The CT data file provides the geometry, the apparent density and the elastic properties for the three-dimensional FE model. A developed pre-processor generates the FE model of a human diaphyseal tibia section which is then analyzed by the SAP IV finite element program. The results obtained are sorted and displayed by a developed post-processor and compared with stresses and deformations from the literature. The model generation method was verified by applying it to a model of simple geometry and boundary conditions, then comparing the results with the analytical solution of the same problem. The convergence behavior of nodal displacements was tested as a function of mesh refinement. This method provides an automatic, versatile, non-invasive and accurate tool of long bone modeling for finite element stress analysis.
Marom
S A
SA
New Jersey Institute of Technology, Newark 07102.
Linden
M J
MJ
D000465:Algorithms; D015519:Bone Density; D001842:Bone and Bones / Q000000981:diagnostic imaging* / Q000502:physiology; D003198:Computer Simulation; D004548:Elasticity; D006801:Humans; D007091:Image Processing, Computer-Assisted; D008297:Male; D008432:Mathematical Computing; D008905:Minicomputers; D008954:Models, Biological; D012016:Reference Values; D012984:Software; D013314:Stress, Mechanical; D013977:Tibia / Q000000981:diagnostic imaging; D014057:Tomography, X-Ray Computed