Accession Number : ADA331158

Title :   Cement Line Interphase Effects on the Dynamic Mechanical Behavior of Haversian Cortical Bone Tissue

Descriptive Note : Final rept. 1 May 95-30 Apr 97,

Corporate Author : TEXAS A AND M UNIV COLLEGE STATION CENTER FOR MECHANICS OF COMPOSITES

Personal Author(s) : Hogan, Harry A.

PDF Url : ADA331158

Report Date : 17 OCT 1997

Pagination or Media Count : 21

Abstract : This research is part of the recent AFOSR initiative in Biomimetics, which has the broad overall goal or seeking to elucidate and understand the salient characteristics of naturally occurring biological composite materials, with an aim toward mimicking these features in devising improved man-made composite materials. The biological composite of interest in this effort is bone tissue, or more specifically Haversian cortical bone tissue. A major underlying task in this project is to develop a more deterministic understanding of the relationships between microstructural details and macroscopic mechanical behavior. The specific objectives of the project are: To conduct extensive dynamic mechanical tests on cortical bone specimens from a variety of sources to determine the dynamic elastic moduli and material damping; To quantitatively characterize the microstructural features of all bone specimens tested: To correlate mechanical behavior and microstructure through statistical analysis as well as theoretical modeling studies. Recent efforts have focused upon developing methods for extending dynamic mechanical testing to include 3-point bending in addition to torsional loading. Effort has also been directed at developing more detailed characterization of material microstructure in two particular areas. One of these areas is bone tissue composition, or more specifically, determining calcium content, phosphorous content, and collagen content.

Descriptors :   *TISSUES(BIOLOGY), CALCIUM, MICROSTRUCTURE, BIOLOGY, DYNAMIC RESPONSE, FIBER REINFORCED COMPOSITES, MODULUS OF ELASTICITY, STATISTICAL ANALYSIS, PHOSPHORUS, TORSION, COLLAGEN, BONES, CONNECTIVE TISSUE.

Subject Categories : Anatomy and Physiology

Distribution Statement : APPROVED FOR PUBLIC RELEASE