DocumentCode :
1715667
Title :
Micropolar elasticity model for stress analysis of human bones
Author :
Purasinghe, R. ; Tan, S.A. ; Rencis, J.J.
Author_Institution :
Dept. of Civil Eng., California State Univ., Los Angeles, CA, USA
fYear :
1989
Firstpage :
839
Abstract :
The solution of a set of axisymmetric finite-element equations that are used to model a microelastic vertebral body subjected to an axial load is presented. A four-node quadrilateral axisymmetric finite-element mesh with variation of the elastic modulus for modeling cortical and trabecular bone components is shown. The results show that high deflection occurred near the center. This is due to the softness of the trabecular bone in the outside region. As a result, the sides of the model experience convex bending, whereas the top and the bottom end plates undergo concave bending due to the axial force. The cortical bone carried most of the axial stress, with the maximum at the quarter depth and near the center circumference. The results of the analysis were compared with a solution based on the classical elasticity solution
Keywords :
biomechanics; bone; finite element analysis; physiological models; stress analysis; axial force; axial load; axisymmetric finite-element equations; bottom end plates; center circumference; classical elasticity solution; concave bending; convex bending; cortical bone; elastic modulus; four-node quadrilateral axisymmetric finite-element mesh; human bones; microelastic vertebral body; micropolar elasticity model; sides; softness; stress analysis; top; trabecular bone components; Biological system modeling; Cancellous bone; Conducting materials; Elasticity; Equations; Finite element methods; Humans; Lakes; Microstructure; Stress;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Engineering in Medicine and Biology Society, 1989. Images of the Twenty-First Century., Proceedings of the Annual International Conference of the IEEE Engineering in
Conference_Location :
Seattle, WA
Type :
conf
DOI :
10.1109/IEMBS.1989.96010
Filename :
96010
Link To Document :
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