Effect of microstructure on fracture characteristics of compact bone

Mitsuo Niinomi, Noboru Watanabe, Makoto Kitaide, Hisao Fukui, Jiro Hasegawa

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

The characteristics concerning bones are poor with increasing the requirement for biomaterials, for example, artificial bones. There is, in particular, still very little knowledge about fracture toughness of bone. There is also still very little knowledge about the effect of microstructure on fracture toughness of bone. The effect of microstructure on fracture characteristics of compact bone of bovine was investigated with the cooperation of fractography in present study. The effect of anisotropy and moisture on both static and dynamic fracture toughness, Kq and Kwas investigated. The static fracture toughness, Kα is 1.5 times greater than the dynamic fracture toughness, Kd. Moisture and anisotropy influence the fracture toughness of bone. Fracture surface of wet sample is found to be more uneven than that of dry sample by fractgrapy on fracture toughness tested samples. The effect of mpisture on crack propagation is confirmed by the observation of osteons. The osteons are sheared in zig-zag manner by the longitudinal load on wet sample while the crack propagates with shearing osteons in dry sample.

Original languageEnglish
Pages (from-to)312-318
Number of pages7
JournalNihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A
Volume64
Issue number618
DOIs
Publication statusPublished - 1998

Keywords

  • Biomaterials
  • Compact bone
  • Crack propagation
  • Dry sample
  • Fracture toughness
  • Microstructure
  • Osteon
  • Wet sample

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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