822 Euler型解法FEMを用いた針穿刺における針と軟組織の変形シミュレーション(J05-1 生命体統合シミュレーション(1),ジョイントセッション,21世紀地球環境革命の機械工学:人・マイクロナノ・エネルギー・環境)

概要

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Needle insertion is minimally invasive cure, but the precise targeting is difficult by the soft tissue deformation and needle deflection. In this study, we simulated needle insertion using Eulerian hydrocode, which could operate multiple objects and their contact. A needle of 0.5mm diameter with a diagonal tip and a soft tissue were modeled, and the needle was inserted into the tissue at the speed of 5mm/sec. As the results, the needle deflection was observed. However, since the hard material of the needle required extremely small time step for the simulations, we largely reduced the Young's Modulus of both the needle and tissue. We also investigated the change of the time step on the process of the needle insertion, and it was cleared that the large decrease of the time step occurred at the first and last contact between the cutting face of the needle tip and the tissue.
社団法人日本機械学会の論文
2008-08-02