緻密骨の破壊特性におよぼすミクロ構造の影響

概要

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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, K_Q and K_d was investigated. The static fracture toughness, K_Q is 1.5 times greater than the dynamic fracture toughness, K_d. 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 moisture 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.
一般社団法人日本機械学会の論文
1998-02-25