| 研究課題/領域番号 |
22K12774
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| 研究種目 |
基盤研究(C)
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| 配分区分 | 基金 |
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| 応募区分 | 一般 |
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| 審査区分 |
小区分90110:生体医工学関連
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| 研究機関 | 早稲田大学 |
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研究代表者 |
朱 暁冬 早稲田大学, 理工学術院, 次席研究員(研究院講師) (90813650)
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| 研究分担者 |
岩崎 清隆 早稲田大学, 理工学術院, 教授 (20339691)
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| 研究期間 (年度) |
2022-04-01 – 2025-03-31
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| 研究課題ステータス |
交付 (2022年度)
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| 配分額 *注記 |
4,160千円 (直接経費: 3,200千円、間接経費: 960千円)
2024年度: 1,430千円 (直接経費: 1,100千円、間接経費: 330千円)
2023年度: 1,430千円 (直接経費: 1,100千円、間接経費: 330千円)
2022年度: 1,300千円 (直接経費: 1,000千円、間接経費: 300千円)
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| キーワード | CDP model / fracture behavior / EMBC / compression test / calcification / finite element analysis / numerical cracking model / cutting/scoring balloon |
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| 研究開始時の研究の概要 |
Refinements of lesion preparation devices with effectively fracturing calcification and reducing arterial injury is necessary.
We aim to reveal the mechanics of calcification fracture with experimental tests and computational simulations to promote the development of the devices.
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| 研究実績の概要 |
We successfully tested an available brittle cracking model, concrete damaged plasticity model (CDP), to confirm the fracture behavior of the calcification model using a demo data. The elements of the calcification model were removed when the value of strain reached the failure criteria of tensile strain. It provided a capability for modeling brittle cracking behavior.
We processed a preferable cylindrical analogue material which mechanical property is close to the real calcification and performed experimental tests to obtain the compression stress-strain data.The peak stress is in good agreement with the value of the calcification.
Recent research outcome of the CDP model tested in the numerical simulation will be presented in an international conference EMBC2023 in July.
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| 現在までの達成度 (区分) |
現在までの達成度 (区分)
3: やや遅れている
理由
We tested an available brittle cracking model and conducted the compression test to obtain the behavior of the analogue material of calcification. A tensile test also will be performed to acquire the tensile stress-strain data.
However, the cylindrical material is not suitable to be used in the tensile test and we have to modified the shape to ensure a successful tensile test. We are now reconstructing the shape and designing an available clamp to improve the tensile test. The experiment will be conducted in this month and finally both of the tensile and compression data will be obtained to be used in the definition of material property in FEM.
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| 今後の研究の推進方策 |
After obtaining both of the tensile and compression stress-strain data of the analogue material of calcification, the CDP cracking model will be assigned to the FE model. The function of the fracture behavior will be verified and the numerical simulation of expanding cutting balloon model in the calcified artery model will be performed to confirm the pressure at the moment of fracture in comparison with the previous experiment.
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