北海道大学 · 工学
福田大輔教授の研究室では、岩石の破壊挙動や破壊過程の高精度な数値シミュレーションを目的として、結合有限要素・離散要素法（FDEM）の高速化と応用に注力しています。特に、GPGPUを活用した並列計算技術を用いて、大規模な岩石破壊・破砕シミュレーションの実現を図っており、動的衝撃や多軸応力下における岩石の挙動解析にも応用しています。また、コンクリートのひび割れ封じ込め挙動や、自然環境下での化学的封じ込め挙動のメカニズムについても、画像解析技術を用いて実験的・数値的アプローチを展開しています。
Figures are computed from collected data and may differ slightly.
Summary The hybrid finite‐discrete element method (FDEM) is widely used for engineering applications, which, however, is computationally expensive and needs further development, especially when rock fracture process is modeled. This study aims to further develop a sequential hybrid FDEM code formerly proposed by the authors and parallelize it using compute unified device architecture (CUDA) C/C++ on the basis of a general‐purpose graphics processing unit (GPGPU) for rock engineering applications
Fukuda, Daisuke, Tisen, Oswald Braken, Momose, Kuniyasu, Sakai, Shoko (2009): Bat Diversity In The Vegetation Mosaic Around A Lowland Dipterocarp Forest Of Borneo. Raffles Bulletin of Zoology 57 (1): 213-221, DOI: 10.5281/zenodo.5341978
In this study, a three-dimensional (3D) combined finite-discrete element method (FDEM) based simulator, which enables the robust simulation of full-scale triaxial Hopkinson bar (Tri-HB) testing system, including the capture of fracture and fragmentation processes of rock specimens as well as the detection and analysis of generated rock fragments, is developed for investigating the dynamic responses of rocks subjected to multiaxial coupled static and dynamic loads. An innovative two-step approach
The combined finite-discrete element method (FDEM) is one of the promising hybrid methods that has attracted much interest for the numerical simulations of complex fracture processes of rocks. The mainstream FDEM simulators developed to date are based on the intrinsic cohesive zone model (ICZM) in which cohesive elements are inserted into all the boundaries of continuum solid elements at the onset of simulations, and a penalty elastic behavior must be incorporated to model the intact deformation
For cementitious composites and materials, the sealing of fractures can occur in water by the precipitation of calcium compounds. In this study, the sealing behavior in a macro-fractured high-strength and ultra-low-permeability concrete (HSULPC) specimen was investigated in simulated seawater using micro-focus X-ray computed tomography (CT). In particular, the influence of fracture width (0.10 and 0.25 mm) on fracture sealing was investigated. Precipitation occurred mainly at the outermost parts
Open papers in the app to read, cite, and organize with AI.
