Journal of the Korean Society for Precision Engineering (한국정밀공학회지)

Korean Society for Precision Engineering (한국정밀공학회)
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Fracture Analysis of Bone-Like Materials Using J integral

J 적분을 이용한 뼈와 유사한 재료의 파괴 해석

  • Lee, Chang-Woo (Department of Mechanical Engineering, Inha Univ.) ;
  • Lin, Song (Department of Mechanical Engineering, Inha Univ.) ;
  • Beom, Hyeon-Gyu (Department of Mechanical Engineering, Inha Univ.)
  • Received : 2010.01.05
  • Accepted : 2010.06.11
  • Published : 2010.09.01
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Abstract

The analysis of a crack in a bone-like material is performed numerically. The bone-like material is hierarchically structured and each hierarchy is structured by mineral platelets and protein matrix through staggered arrangement. Mechanical behavior of the composite can be analyzed using tension shear chain model. The Dugdale model is adopted to evaluate the fracture energy of Bone-like material. The fracture energy dissipation is assumed to concentrate within a strip near the crack tip along the prospective crack path. Fracture criterion of the bone-like material is estimated by using J integral. Effects of hierarchical level, ratio of elastic modulus of mineral to protein, aspect ratio of mineral platelet and volume fraction on J integral are investigated. It is found that the J integral decreases as elastic modulus ratio and hierarchy level increase. It is also shown that the J integral increases as the volume fraction and aspect ratio decrease.

Keywords

References

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