Bone stiffness changes due to microdamage under different loadings.
Stiffness changes due to microdamage in the longitudinal and cross-sectional directions in a dog bone model under different loadings were investigated using three-dimensional finite element analysis. Stiffness changes and severity of both longitudinal and cross-sectional type microcracks were estimated between the damaged and undamaged bone under four-point bending, torsion and tension. Finite element simulation results indicated that longitudinal damage was more severe than cross-sectional damage under axial tension and bending, and the opposite was true for torsional loading. However, for axial tension, the stiffness change due to cross-sectional microcracks remained constant.
Pidaparti
R M
RM
Department of Mechanical Engineering, Purdue University, Indianapolis, IN 46202-5132, USA. ramana@engr.iupui.edu
Liu
Y
Y
D000818:Animals; D001842:Bone and Bones / Q000502:physiology*; D003198:Computer Simulation; D004285:Dogs; D004548:Elasticity; D066298:In Vitro Techniques; D013314:Stress, Mechanical; D013718:Tensile Strength; D016474:Weight-Bearing / Q000502:physiology*