Estimating the effective Young's modulus of soft tissues from indentation tests - Nonlinear finite element analysis of effects of friction and large deformation

Ming Zhang, Yongping Zheng, Arthur F T Mak

Research output: Journal article publicationJournal articleAcademic researchpeer-review

203 Citations (Scopus)

Abstract

A nonlinear finite element model was developed to investigate the biomechanics of indentation, particularly the influence of friction and large deformation on the calculation of the effective Young's modulus from the cylindrical, flat-ended indentation test of soft tissues. A new κ table was given for calculation of the effective Young's modulus to account for the effects of layered geometry with consideration of the larger deformation. The results indicate that the effect of friction on the calculation of Young's modulus becomes significant with a large aspect ratio and with a large Poisson's ratio. It is found that the factor κ increases almost proportionally to the increase of the indentation depth, especially obvious with a larger Poisson's ratio v and a larger aspect ratio a/h.
Original languageEnglish
Pages (from-to)512-517
Number of pages6
JournalMedical Engineering and Physics
Volume19
Issue number6
DOIs
Publication statusPublished - 1 Sep 1997

Keywords

  • Finite element analysis
  • Friction
  • Indentation
  • Large deformation
  • Soft tissue

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine
  • Psychology(all)

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