Nanostructure and Properties of a Shinbone |
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| Authors: | B Chen J Luo Q Yuan |
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| Affiliation: | (1) State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an, 710049, P.R. China;(2) College of Life Science & Engineering, Shaanxi University of Science & Technology, Xi’an, 710021, P.R. China; |
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| Abstract: | Scanning electron microscope (SEM) observation shows that a shinbone is composed of large-volume-fraction hydroxyapatite and
small-volume-fraction collagen protein materials. The hydroxyapatite is of laminated structure and consists of numberless
hydroxyapatite sheets. The observation also shows that the hydroxyapatite sheets are parallel with each other and of nanometer
scale. The high fracture toughness and fracture strength of the bone are investigated based on the calculation formula of
the dissipation work and Griffith criterion. The investigated results reveal that the large-volume fraction and the nanometer
scale of the hydroxyapatite sheets are the important factors to the high mechanical performance of the bone. |
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