A refined FEM model to capture the elastic and inelastic anisotropic behaviour of cortical bone tissue as shown by indentation tests

Davide Carnelli, Dario Gastaldi, Christine Ortiz, Pasquale Vena, Roberto Contro

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The numerical approach can be successfully used to investigate aspects of bone tissue mechanics that analytical methods solve in approximate way or do not cover. In this work, a finite element model was developed for numerical simulations of nanoindentation tests on cortical bone. The model allows for anisotropic elastic and postyield behaviour of the tissue. Indentation experiments along the axial and transverse directions were simulated. Results showed that the transverse to axial mismatch of indentation moduli was correctly simulated regardless of the constitutive parameters used to describe the post-yield behaviour. Instead, the transverse to axial hardness mismatch observed in experimental studies can be correctly simulated through an anisotropic yield constitutive model only. The presented model allows capturing simultaneously the experimental findings of direction-dependent indentation and directiondependent hardness of the tissue.

Original languageEnglish
Title of host publicationAES-ATEMA International Conference Series - Advances and Trends in Engineering Materials and their Applications
Pages43-47
Number of pages5
Publication statusPublished - 2010
Event5th International Conference on Advances and Trends in Engineering Materials and their Applications, AES-ATEMA'2010 - Montreal and Quebec City, QC, Canada
Duration: Jun 27 2010Jul 3 2010

Other

Other5th International Conference on Advances and Trends in Engineering Materials and their Applications, AES-ATEMA'2010
CountryCanada
CityMontreal and Quebec City, QC
Period6/27/107/3/10

Keywords

  • Anisotropy
  • Cortical bone
  • Finite element
  • Indentation
  • Tension-compression mismatch

ASJC Scopus subject areas

  • Mechanics of Materials
  • Materials Science(all)

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