Collagen fiber orientation and geometry effects on the mechanical properties of secondary osteons

Pidaparti, R. M. V.; Burr, D. B.

Affiliations

¹Department of Mechanical Engineering, Purdue University, 723 W. Michigan Street, Indianapolis, IN 46202, U.S.A.

²Biomechanics and Biomaterials Research Center, Indiana University, Indianapolis, IN 46202, U.S.A.

³Department of Anatomy, Indiana University, Indianapolis, IN 46202, U.S.A.

⁴Department of Orthopaedic Surgery, Indiana University, Indianapolis, IN 46202, U.S.A.

Abstract

The effects of collagen fiber orientation and osteon geometry on the mechanical properties of secondary osteons under axial compression/tension and combined loadings (compression, bending and torsion) were investigated using a composite-beam finite-element model. Three cross-sectional shapes of secondary osteons were studied to show the effect of geometry. The results of stiffness are presented using the tension and compression properties for each lamella. The model shows that the mechanical properties of osteons are enhanced in bending and torsion when collagen fibers are oriented within 30° of the loading axis. Osteons with alternating lamellar orientation are not well adapted to resist torsional moments, but alternate collagen fiber orientation has virtually no effect on the bending stiffness of osteons. Fiber orientation affects the mechanical properties less significantly when osteons are non-circular. Collagen fiber orientation and osteon geometry interact to determine the mechanical behavior of the osteon, and may act in a compensatory manner in the adaptive process.

Links

DOI: 10.1016/0021-9290(92)90227-R

PubMed: 1639831

WoS: A1992JD39100006

History

Received: 1991-11-27

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Cited By (18)

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