| Project/Area Number |
23K13403
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| Research Category |
Grant-in-Aid for Early-Career Scientists
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| Allocation Type | Multi-year Fund |
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| Review Section |
Basic Section 22030:Geotechnical engineering-related
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| Research Institution | Kyoto University |
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Principal Investigator |
ZHU FAN 京都大学, 工学研究科, 准教授 (80968553)
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| Project Period (FY) |
2023-04-01 – 2026-03-31
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| Project Status |
Granted (Fiscal Year 2023)
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| Budget Amount *help |
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2025: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2024: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2023: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
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| Keywords | fracture / peridynamics / fluid-solid-interaction / particle method / fractures / multiphysics / fluid-solid interaction / porous media |
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| Outline of Research at the Start |
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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| Outline of Annual Research Achievements |
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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| Current Status of Research Progress |
Current Status of Research Progress
2: Research has progressed on the whole more than it was originally planned.
Reason
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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| Strategy for Future Research Activity |
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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