2020 Fiscal Year Annual Research Report
Simulation of the full phenomenon of mass movement disasters using a multi-stage particle method
| Project/Area Number |
20J13114
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| Research Institution | Kyushu University |
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Principal Investigator |
MORIKAWA DANIEL SHIGUEO 九州大学, 工学府, 特別研究員(DC2)
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| Project Period (FY) |
2020-04-24 – 2022-03-31
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| Keywords | SPH / GPU / FSI / Saturated soil / Geomechanics |
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| Outline of Annual Research Achievements |
I started the scholar year with the task of finishing a paper on high performance computing for the SPH method using GPU accelerators. The title of the paper is “Explicit incompressible smoothed particle hydrodynamics in a multi-GPU environment for large-scale simulations”. Fortunately, we were successful in publishing this paper in the journal Computational Particle Mechanics.
Thens, I started studying the usage of SPH in Solid Mechanics problems. To assure the numerical accuracy of the method and to expand its application to a broader category of problems, I started to work with fluid-structure interaction. The goal was to test the SPH method for Solid Mechanics while combining it with the EISPH method that I was already using for fluids. The implementation was successful, which resulted in the acceptance of a paper in the journal Computational Methods in Applied Mechanics and Engineering. The paper title is “Coupling total Lagrangian SPH-EISPH for fluid-structure interaction with large deformed hyperelastic solid bodies”.
Finally, as the final task of my PhD course, I started to tackle the field of Geomechanics with the intention to propose a SPH based numerical method capable of dealing with coupled soil-fluid interaction problems. The basis of the current method is similar to the Solid Mechanics part explained above but including elastoplastic constitutive models to simulate the soil behavior. Until now, I have obtained promising results including either the Mohr-Coulomb, Drucker-Prager and Cam-Clay constitutive models.
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| Current Status of Research Progress |
Current Status of Research Progress
1: Research has progressed more than it was originally planned.
Reason
The research has been performing above my expectations, as I could publish two papers in international journals. Also, with my current status on Geomechanics problems simulation, I already have enough numerical results to publish a third one, which is in the course of production.
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| Strategy for Future Research Activity |
I expect to publish a paper on numerical simulations for fully saturated soils very soon. Next, I intend to expand this method to include unsaturated soils to solve the problem of infiltration. Finally, with both numerical schemes, I might be able to predict landslide events under specific rainfall conditions.
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