A5040202518- Fatigue and fracture mechanics
- Welding Techniques and Residual Stresses
- Advanced Welding Techniques Analysis
- Ship Hydrodynamics and Maneuverability
- Engineering Applied Research
- Structural Integrity and Reliability Analysis
- Ocean Waves and Remote Sensing
- Oceanographic and Atmospheric Processes
- Numerical methods in engineering
- Laser and Thermal Forming Techniques
- Metal Forming Simulation Techniques
- Aluminum Alloys Composites Properties
- Structural Load-Bearing Analysis
- Structural Behavior of Reinforced Concrete
- Aluminum Alloy Microstructure Properties
- Concrete Corrosion and Durability
- High-Velocity Impact and Material Behavior
- Metal Alloys Wear and Properties
- Fluid Dynamics Simulations and Interactions
- Hydrogen embrittlement and corrosion behaviors in metals
- Maritime Navigation and Safety
- Tropical and Extratropical Cyclones Research
- Structural Response to Dynamic Loads
- Wave and Wind Energy Systems
- High Entropy Alloys Studies
ClassNK
2015-2024
Tenaris (United States)
2005
Aisin (Japan)
2004
College of Medical Sciences
2001
Showa University
2001
Tokyo University of Marine Science and Technology
1999
Tokyo Institute of Technology
1998
Aarhus University
1996
Osaka Medical Center for Cancer and Cardiovascular Diseases
1967
Accurate knowledge of ocean surface waves is crucial for ship design. With the significant advancements in model physics and numerical resources, recent wave hindcast data has potential to provide environmental conditions estimating load design process. To help estimate extreme loads with quantified uncertainty strength assessments structures, this study aims quantify state-of-the-art products. Model was deduced from inter-model comparisons four products after evaluations. For evaluations,...
In this study, a strategy based on the s-version finite element method (S-method) for accurately and efficiently modelling an internal traction-free boundary of solid body was established utilising Neumann conditions local mesh. conventional studies, is modelled only considering mesh; global mesh defined independently geometry boundary. Although effective in simplifying meshing procedure problems with boundary, its verification has not been sufficiently investigated. This study first...
The ocean waves in the North Atlantic Ocean are internationally recognized to represent a wave climate suitable for design of merchant ships. However, accumulated knowledge from past indicates that encountered sea states less severe than Standard Wave Data recommended by International Association Classification Society. In this study, we propose statistical model representing storm avoidance ships and apply it newly computed 25-year hindcast (TodaiWW3-NK) Ocean. We derive statistics relates...
The objective of this research was to develop a single-pass vertical welding process for thick steel plates using hot-wire laser reduce the heat input. A diode with large rectangular beam spot and twin feeding system were used. Welding phenomena investigated stationary weaving irradiation small groove widths. Single-pass low input dilution could be achieved. critical energy density existed each speed at which fusion surface commence. affected compared speed. Weaving made it possible maintain...
Developing a numerical method to accurately simulate the brittle crack propagation phenomenon is crucial for ensuring safety of large-scale steel structures. Although recent studies have demonstrated that using local fracture stress criterion as condition effective, most critical issue methods evaluating in vicinity dynamically propagating front not been established. To address this, this paper proposes strategy analysing 3D solids on basis s-version finite element (s-method). In proposed...
The present study investigates laser irradiating and hot-wire feeding methods, specifically vertical irradiation with double oblique single feeding. effect of the angle was obtained by making cross-sectional observations a joint 10-mm gap. Oblique then applied to relatively small gap (5 mm) investigate tolerance method. A diode large rectangular beam spot system were employed in proposed process. Results showed that while at an 15° achieved almost same weld bead as (0°), larger 30° resulted...
Earth and Space Science Open Archive This preprint has been submitted to is under consideration at Science. ESSOAr a venue for early communication or feedback before peer review. Data may be preliminary.Learn more about preprints preprintOpen AccessYou are viewing the latest version by default [v1]Modeled satellite-derived extreme wave height statistics in North Atlantic Ocean reaching 20 mAuthorsTakujiWasedaiDKaushikSasmaliDTsubasaKodairaiDYukiKitaiDReiMiratsuTingyaoZhuTsutomuFukuiiDSee all...
The fatigue crack problems that broke out at the end of twentieth century were properties in hull structures. This motivated research on a lot technologies against fracture. It was clarified detection initiation complex welded structures like hulls is quite difficult, and length recognition mostly long compared to mechanical parts. From these results, not only stress reduction critical areas by improvement design but also newly developed materials with excellent resistance growth has been...
It is clear that detection of fatigue crack initiation in complex welded structures like hulls quite difficult, and the length at recognition mostly long compared to mechanical parts. From these facts, not only stress reduction critical area by design improvement, but also newly developed steels excellent for propagation resistance are desirable structural integrity. Newly steel FCA, which was controlled metallic microstructures, introduced part one within a series our research. Various...
Abstract The statistics of the waves in North Atlantic Ocean have been used as basis ship design for decades. Recently, there efforts to update scatter diagram wave height and period based on numerical hindcast data combined with AIS data. However, validation extreme distribution is problematic due lack observational In this study, we compared value estimates among a 25-year simulation satellite-derived products from 1994 2018 sampled Global Wave Statistics areas 8, 9, 15, 16. comparison...
Abstract Since ships are being operated under consideration of the safety for lives and properties, economical reasons so on, sea states in natural phenomena those actually encountered by thought to be different, latter has some effects human operational factors (called as “ship effect”). Evaluating ship effect detail is important consider rational wave design loads hull structure strength. The purpose this study evaluate quantitatively. As first report, comparison was made between IACS...