| 研究課題/領域番号 |
23K13403
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| 研究種目 |
若手研究
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| 配分区分 | 基金 |
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| 審査区分 |
小区分22030:地盤工学関連
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| 研究機関 | 京都大学 |
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研究代表者 |
ZHU FAN 京都大学, 工学研究科, 准教授 (80968553)
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| 研究期間 (年度) |
2023-04-01 – 2026-03-31
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| 研究課題ステータス |
交付 (2023年度)
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| 配分額 *注記 |
4,290千円 (直接経費: 3,300千円、間接経費: 990千円)
2025年度: 780千円 (直接経費: 600千円、間接経費: 180千円)
2024年度: 910千円 (直接経費: 700千円、間接経費: 210千円)
2023年度: 2,600千円 (直接経費: 2,000千円、間接経費: 600千円)
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| キーワード | fracture / peridynamics / fluid-solid-interaction / particle method / fractures / multiphysics / fluid-solid interaction / porous media |
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| 研究開始時の研究の概要 |
Assessment of rock fractures is a crucial task in the fields of geotechnical and geoenvironmental engineering. In this research, a particle-based method, namely peridynamics, will be developed to establish a coupled thermal-hydro-mechanical computational framework for modeling evolving fractures in porous rock. The research will develop particle-based method for modeling both fluid and solid, establish proper fluid-solid interaction scheme to model fluid diffusion and fluid-driven fractures, and develop proper algorithms to consider the interplay between the thermal field and fractures.
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| 研究実績の概要 |
The following work has been completed as scheduled.
1). A peridynamics-based fluid solver is developed based on an updated-Lagrangian computing scheme. To improve numerical stability, stabilization schemes are implemented. The scheme is validated with water dam collapsing experiments.
2). A coupled hydro-mechanical peridynamic method is developed for simulation of fluid-driven fracturing in solids. Classical peridynamics theory is used for simulating solid with fracturing, update-Lagrangian peridynamics is adopted for fluid modeling, with a fictious-point solid-fluid interaction modeling scheme. The new method is proven effective in modeling hydraulic fracturing in impermeable solid by comparing with theoretical solutions.
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| 現在までの達成度 (区分) |
現在までの達成度 (区分)
2: おおむね順調に進展している
理由
The planned work up to the first quarter of 2024 has been finished as scheduled, including development of a peridynamics-based fluid solver and a fluid-solid interaction modeling scheme. The planned work in 2024-2025 is being progressed smoothly, including development of poroelastic peridynamics model and hydraulic fracturing in porous media. Coupled hydro-thermal-mechanical solver is under development.
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| 今後の研究の推進方策 |
Focus will be placed in the following research directions:
1. A poroelastic peridynamic computation library will be developed, based on the poroelastic theory and flow governing equation with implementation of non-local integral-differentiation operator. New formulation will be derived and implemented with computer codes. The computation scheme will be validated with a series of experiments and theoretical solutions such as flow and hydraulic fracturing in porous media.
2. A fully coupled thermal-mechanical peridynamic formulation will be derived and implemented with consideration of temperature-dependence of deformation as well as deformation-dependence of heat conduction. Finally a coupled hydro-thermal-mechanical peridynamic computational scheme will be formed.
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