Effect of anisotropy on elastic moduli measured by nanoindentation in human tibial cortical bone

J.G. Swadener, Jae-Young Rho, G.M. Pharr

Research output: Contribution to journalArticle

Abstract

Many biological materials are known to be anisotropic. In particular, microstructural components of biological materials may grow in a preferred direction, giving rise to anisotropy in the microstructure. Nanoindentation has been shown to be an effective technique for determining the mechanical properties of microstructures as small as a few microns. However, the effects of anisotropy on the properties measured by nanoindentation have not been fully addressed. This study presents a method to account for the effects of anisotropy on elastic properties measured by nanoindentation. This method is used to correlate elastic properties determined from earlier nanoindentation experiments and from earlier ultrasonic velocity measurements in human tibial cortical bone. Also presented is a procedure to determine anisotropic elastic moduli from indentation measurements in multiple directions.
Original languageEnglish
Pages (from-to)108-112
Number of pages5
JournalJournal of Biomedical Materials Research: Part A
Volume57
Issue number1
Early online date14 Jun 2001
DOIs
Publication statusPublished - Oct 2001

Keywords

  • anisotropy
  • cortical bone
  • elastic modulus
  • nanoindentation
  • ultrasonic velocity

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