Transverse mechanical properties of collagen fibers from nanoindentation

Katerina E Aifantis, Sanjiv Shrivastava, Gregory M. Odegard

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

The mechanical properties of collagenous tissues, such as tendon and ligaments, are of particular interest as they are found extensively in the human body. In the present study the transverse mechanical properties of collagen fibers are reported for the first time. The elastic modulus was found to be 63 ± 4 MPa, while the viscosity was estimated to be 14 GPa ≤ η ≤ 56 GPa s. Comparison with similar data in the literature, for bulk tendon and collagen fibrils, suggests that the apparent modulus of a network of interconnected building blocks is reduced as compared to the modulus of the individual building blocks; in particular E tendon < E fiber < E fibril; this is due to the fact that as the scale of the microstructure increases (i) slippage and sliding between the respective building blocks (fibrils or fibers) increases, (ii) the volume fraction of the stiff collagen proteins decreases.

Original languageEnglish (US)
Pages (from-to)1375-1381
Number of pages7
JournalJournal of Materials Science: Materials in Medicine
Volume22
Issue number6
DOIs
StatePublished - Jun 2011
Externally publishedYes

Fingerprint

Tendons
Nanoindentation
Collagen
Mechanical properties
Fibers
Elastic Modulus
Ligaments
Human Body
Viscosity
Volume fraction
Elastic moduli
Tissue
Proteins
Microstructure

ASJC Scopus subject areas

  • Biophysics
  • Biomaterials
  • Bioengineering
  • Biomedical Engineering

Cite this

Transverse mechanical properties of collagen fibers from nanoindentation. / Aifantis, Katerina E; Shrivastava, Sanjiv; Odegard, Gregory M.

In: Journal of Materials Science: Materials in Medicine, Vol. 22, No. 6, 06.2011, p. 1375-1381.

Research output: Contribution to journalArticle

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