Development of particle based numerical model taking into account morphological changes in clay minerals and microscopic understanding of slaking phenomena

2021 Fiscal Year Final Research Report

• Project/Area Number: 19K15085
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 22030:Geotechnical engineering-related
• Research Institution: Nagaoka University of Technology
• Principal Investigator: Fukumoto Yutaka 長岡技術科学大学, 工学研究科, 准教授 (60757350)
• Project Period (FY): 2019-04-01 – 2022-03-31
• Keywords: スレーキング / 風化 / 個別要素法 / 粒状体 / 粒子シミュレーション / 亀裂 / Peridynamics

Outline of Final Research Achievements

We developed a particle-based numerical model to understand the slaking phenomenon of geomaterials from a microscopic viewpoint. A DEM (Distinct Element Method) model that takes into account changes in the size of the region occupied by clay minerals and a coupled peridynamics and the DEM model that can take into account fracture behavior with crack propagation are investigated.

Free Research Field

地盤工学

Academic Significance and Societal Importance of the Research Achievements

スレーキングは，道路盛土や自然斜面・切土斜面の崩壊の原因となりうるため，その発生機構を詳細に理解することは予期せぬ地盤災害を軽減するうえで重要な課題である．本研究で開発した粒子計算モデルを今後も発展させることができれば，複雑なスレーキング現象の進行要因の定量的な分類と整理ができる可能性がある．