Strength And Toughness Mechanisms Of Nanometer Scale And Vortical Structure Of Thighbone

Keywords

Fracture strength; Fracture toughness; Nanometer scale; Thighbone; Vortical structure

Abstract

The observation of scanning electron microscopy (SEM) shows that thighbone is a kind of bioceramic composite consisting of inorganic hydroxyapatite layers and organic collagen protein matters. The hydroxyapatite layers are parallel with the surface of the bone and consist of numerous long and thin hydroxyapatite sheet fibers. The thickness of the hydroxyapatite sheet fibers is within nanometer scale. The observation also shows that the nano-hydroxyapatite sheet fibers in an arbitrary hydroxyapatite layer make an almost constant angle against the nano-hydroxyapatite sheet fibers in their adjacent hydroxyapatite layers, which forms a kind of special vortical structure. The mechanisms of the high strength and toughness of the bone are investigated based on the characteristics of the nanometer scale and the vortical structure of the bone and the theories of fracture mechanics and composite mechanics. It is indicated that the nanometer scale and the vortical structure of the hydroxyapatite sheet fibers endow the bone with high fracture strength and fracture toughness.

Publication Date

7-1-2016

Publication Title

Journal of Nanoscience and Nanotechnology

Volume

16

Issue

7

Number of Pages

7251-7256

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1166/jnn.2016.11313

Socpus ID

84979082155 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84979082155

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