Hokkaido University · 공학
다이스케 후쿠다 교수의 연구실은 주로 암석의 복잡한 균열 및 파손 거동을 수치적으로 모의하는 유한요소-이산요소 혼성 방법(FDEM)을 핵심으로 하며, 특히 고성능 컴퓨팅(GPGPU, CUDA)을 활용한 병렬 계산 기법을 도입해 대규모 및 고속 동적 시뮬레이션을 구현하고 있습니다. 암석의 다축 응력 상태 하에서의 동적 거동, 파손 및 파편화 과정의 정밀한 분석은 물론, 콘크리트의 균열 자가봉착 메커니즘 등 실재 공학 재료의 거동 연구도 함께 진행하고 있습니다. 이는 지반, 지반공학, 구조물의 내구성 및 안전성 향상에 기여하는 응용 연구를 포함합니다.
표시된 성과는 수집된 데이터 기준으로 산출되며, 일부 차이가 있을 수 있습니다.
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
