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Article type: Research Article
Authors: Pidaparti, Ramana M.; | Liu, Yue
Affiliations: Department of Mechanical Engineering, Purdue University, Biomechanics and Biomaterials Research Center, Indiana University and Purdue University at Indianapolis (IUPUI), Indianapolis, IN 46202, USA
Note: [] Correspondence to: Ramana M. Pidaparti, Ph.D., Department of Mechanical Engineering, Purdue University at Indianapolis (IUPUI) , 723 W. Michigan Street, Indianapolis, IN 46202-5132, USA. Tel.: +1 317 274 9717; Fax: +1 317 274 9744; E-mail: ramana@engr.iupui.edu.
Abstract: 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.
Keywords: Microdamage, fatigue, finite element method, bone, simulation
DOI: 10.3233/BME-1997-7304
Journal: Bio-Medical Materials and Engineering, vol. 7, no. 3, pp. 193-203, 1997
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