Postfailure modulus strongly affects microcracking and mechanical property change in human iliac cancellous bone

A study using a 2D nonlinear finite element method

Xiang Wang, Roger R. Zauel, David P Fyhrie

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

A two-dimensional (2D) finite element (FE) method was used to estimate the ability of bone tissue to sustain damage as a function of postfailure modulus. Briefly, 2D nonlinear compact-tension FE models were created from quantitative back-scattered electron images taken of human iliac crest bone specimens. The effects of different postfailure moduli on predicted microcrack propagation were examined. The 2D FE models were used as surrogates for real bone tissues. The crack number was larger in models with higher postfailure modulus, while mean crack length and area were smaller in these models. The rate of stiffness reduction was greater in the models with lower postfailure modulus. Hence, the current results supported the hypothesis that hard tissue postfailure properties have strong effects on bone microdamage morphology and the rate of change in apparent mechanical properties.

Original languageEnglish (US)
Pages (from-to)2654-2658
Number of pages5
JournalJournal of Biomechanics
Volume41
Issue number12
DOIs
StatePublished - Aug 28 2008

Fingerprint

Microcracking
Bone
Finite element method
Bone and Bones
Mechanical properties
Tissue
Cracks
Microcracks
Electrons
Stiffness
Cancellous Bone

Keywords

  • Bone mineralization
  • Compact-tension
  • Finite element
  • Microcrack
  • Trabecular bone

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine

Cite this

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abstract = "A two-dimensional (2D) finite element (FE) method was used to estimate the ability of bone tissue to sustain damage as a function of postfailure modulus. Briefly, 2D nonlinear compact-tension FE models were created from quantitative back-scattered electron images taken of human iliac crest bone specimens. The effects of different postfailure moduli on predicted microcrack propagation were examined. The 2D FE models were used as surrogates for real bone tissues. The crack number was larger in models with higher postfailure modulus, while mean crack length and area were smaller in these models. The rate of stiffness reduction was greater in the models with lower postfailure modulus. Hence, the current results supported the hypothesis that hard tissue postfailure properties have strong effects on bone microdamage morphology and the rate of change in apparent mechanical properties.",
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