A damage model to simulate nanoindentation tests of lamellar bone at multiple penetration depth

R. Lucchini, D. Carnelli, D. Gastaldi, M. Shahgholi, R. Contro, P. Vena

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

Abstract

A Continuum Isotropic Damage Model has been developed into Finite Element model with the purpose to simulate indentation experiments carried out at different penetration depths. Previous experiments on bovine cortical bone samples along axial and transverse directions have shown two peculiar results: a decrease of about 20% of the indentation modulus with indentation depth, both for axial and transvevrse directions, and a relevant stiffness loss (curve concavity) during the unloading branches of the force-displacement indentation curves. The first experimental evidence can be regarded as a size effect. The basic hypothesis for the present work is that a damage mechanism acting at the lamellar bone geometrical scale can explain both the above described experimental observations.

Original languageEnglish
Title of host publicationECCOMAS 2012 - European Congress on Computational Methods in Applied Sciences and Engineering, e-Book Full Papers
Pages5919-5924
Number of pages6
Publication statusPublished - 2012
Event6th European Congress on Computational Methods in Applied Sciences and Engineering, ECCOMAS 2012 - Vienna, Austria
Duration: Sep 10 2012Sep 14 2012

Other

Other6th European Congress on Computational Methods in Applied Sciences and Engineering, ECCOMAS 2012
Country/TerritoryAustria
CityVienna
Period9/10/129/14/12

Keywords

  • Anisotropy Damage mechanics
  • Finite element models
  • Lamellar bone
  • Nanoindentation

ASJC Scopus subject areas

  • Computational Theory and Mathematics
  • Applied Mathematics

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