0936 X線IPによる皮質骨HAp結晶ひずみの測定(S05-2 生体のシミュレーション・モデリング・計測(2),S05 生体のシミュレーション・モデリング・計測)

概要

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Bone tissue is a composite material composed of hydroxyapatite (HAp) and collagen. Since HAp is a crystalline structure, an X-ray diffraction method can be used to measure the lattice strain of HAp crystals. Although scintillation counter has been used to obtain an X-ray diffraction profile, a large amount of X-ray irradiation is necessary to obtain principal strains. Imaging plate (IP) would be useful to measure the strain distribution with smaller amount of irradiation. IP gives a diffraction image, thus planar distribution of strain could be obtained in a single measurement. We developed the HAp strain measurement system using IP. Distribution of HAp lattice strain was measured under tensile loading of bone specimen using this measurement system. Maximum and minimum strains of HAp were obtained from the results. The result also showed that tensile loading direction of specimen identified maximum strain direction of HAp, thus strain distribution would be appropriate. X-ray irradiation time was shorten to a large degree than measurement using scintillation counter.
社団法人日本機械学会の論文
2007-09-07