Effect of microstructure on fatigue strength of bovine compact bones

Jong Heon Kim, Mitsuo Niinomi, Toshikazu Akahori, Junji Takeda, Hiroyuki Toda

研究成果: ジャーナルへの寄稿記事

15 引用 (Scopus)

抄録

Despite its clinical importance in developing artificial bone, limited information is available regarding the microstructure with respect to the fatigue characteristics of bones. In this study, the fatigue characteristics of the bovine humerus and femur were investigated with respect to microstructures. Fatigue tests were conducted on the bovine humerus and femur at a stress ratio of 0.1 and a frequency of 10 Hz. The fatigue strength of the plexiform bone is slightly greater than that of the haversian bone. This is because the volume fraction of voids in the haversian bone, which is the site of stress concentration, is higher than that of voids in the plexiform bone. Several microcracks are observed on the fatigue fracture surface of the haversian bone. The microcracks are short and their propagation directions are random. However, the number of the microcracks in the plexiform bone is very small. The microcracks are relatively long and their propagation directions are parallel to the longitudinal direction of the lamellar bone. Therefore, the crack requires relatively more energy to propagate across the lamella in the plexiform bone.

元の言語英語
ページ(範囲)472-480
ページ数9
ジャーナルJSME International Journal, Series A: Solid Mechanics and Material Engineering
48
発行部数4
DOI
出版物ステータス出版済み - 4 15 2006

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Bone
Microstructure
Microcracks
Fatigue of materials
Fatigue strength
Stress concentration
Volume fraction
Cracks
Direction compound

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering
  • Materials Science(all)

これを引用

Effect of microstructure on fatigue strength of bovine compact bones. / Kim, Jong Heon; Niinomi, Mitsuo; Akahori, Toshikazu; Takeda, Junji; Toda, Hiroyuki.

:: JSME International Journal, Series A: Solid Mechanics and Material Engineering, 巻 48, 番号 4, 15.04.2006, p. 472-480.

研究成果: ジャーナルへの寄稿記事

Kim, Jong Heon ; Niinomi, Mitsuo ; Akahori, Toshikazu ; Takeda, Junji ; Toda, Hiroyuki. / Effect of microstructure on fatigue strength of bovine compact bones. :: JSME International Journal, Series A: Solid Mechanics and Material Engineering. 2006 ; 巻 48, 番号 4. pp. 472-480.
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