Accession Number : ADA268250


Title :   Micromechanics Modeling and Analysis of Haversian Compact Bone Tissues as a Fiber Reinforced Composite Material


Descriptive Note : Annual rept. 1 Apr 92-31 Mar 93,


Corporate Author : TEXAS A AND M RESEARCH FOUNDATION COLLEGE STATION


Personal Author(s) : Hogan, Harry A ; De Frese, Raymond J


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a268250.pdf


Report Date : 30 Jun 1993


Pagination or Media Count : 35


Abstract : Haversian compact bone tissue is being studied theoretically and experimentally to characterize its behavior as a fiber reinforced composite material with the aim of biomimicking its salient features. Analytical and finite element based composite micromechanics techniques have been developed and evaluated for theoretical modeling of structure/property relationships. Two-dimensional finite element models of material representative volume elements have been used to predict variations in macroscopic mechanical properties with porosity, constituent properties, and fiber/matrix interface conditions. Haversian compact bone possesses a distinct 'interphase' material surrounding each osteon called the cement line. The role and properties of the cement line are of particular interest for possible biomimicking. mechanical testing of bone specimens is accompanying the theoretical work to provide data for verification and model improvement. The experimental protocol has been established and preliminary testing is underway. Specimens are submitted to the subcontractor following testing for microstructural characterization. The microstructural parameters of interest are the density (wet & dry), percent porosity, osteon density, cement line density, and percent ash content (mineralization). Three-dimensional image reconstruction of Haversian canals, which are the main sources of porosity, has also been initiated in order to provide a more comprehensive measure of void space characteristics.


Descriptors :   *TISSUES(BIOLOGY) , *FIBER REINFORCED COMPOSITES , *BONES , FIBERS , COMPOSITE MATERIALS


Subject Categories : Anatomy and Physiology
      Laminates and Composite Materials


Distribution Statement : APPROVED FOR PUBLIC RELEASE