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Marine Materials and Production Engineering Lab
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A lab that investigates the durability of ships and structures in extreme environments.
AboutAbout the lab
Exploring durability and longer service life in extreme environments.
The Marine Materials and Production Engineering Lab researches technologies that improve the durability of ships, offshore structures, and various machines so that they can be used for a long time in extreme environments.
In environments such as rough open seas, high-pressure deep seas, and ice-covered seas, the lab investigates, through both experiments and numerical simulation, how fatigue, corrosion, and wear progress and lead to failure.
It also combines data science and AI to optimize manufacturing processes such as shipbuilding fabrication and to automate quality inspection.
The lab has a system in which students receive careful guidance on experiments and calculations from senior students and faculty, and many international students are enrolled.
Key terms
- Fatigue
- Damage in which cracks form and grow under repeated loading until the material eventually fails
- High-frequency mechanical impact (HFMI) treatment
- One method of improving fatigue strength. Also known as HFMI, an abbreviation of its English name
- Data assimilation
- A method that incorporates measurement data into a simulation to estimate structural response from information at a limited number of measurement points
NewsLab news
A master's student wins the Japan Welding Society's 2025 Outstanding Research Presentation Award
Prof. Tsutsumi wins the FS Award from the Welding Fatigue Strength Research Committee of the Japan Welding Society
A paper by Prof. Tsutsumi and colleagues is published in the Journal of the Japan Society of Civil Engineers
A paper by Prof. Tsutsumi and colleagues is published in the Journal of Constructional Steel Research
A paper by Prof. Tsutsumi and colleagues is published in Tetsu-to-Hagané
ResearchResearch themes
The lab aims to establish technologies in design, materials, manufacturing, inspection, and maintenance that improve the durability and extend the service life of ships, offshore structures, and machines exposed to extreme environments. Its research uses experiments and numerical simulation as two pillars, combined with data science and AI.
*Illustrative imageStructural Durability (Fatigue, Corrosion, Wear)
Floating offshore wind power requires integrity assessment of mooring chains, which suffer wear and corrosion in seawater. The lab conducts response analysis of floating bodies and mooring lines as well as wear tests, and also researches the prediction of corrosion wastage in ballast tanks.
*Illustrative imageMechanisms of Fatigue, Corrosion, and Wear and Life Assessment
To assess the structural integrity of ships, the lab models time histories of wave loads and quantitatively evaluates the life-extending effect of fatigue strength improvement methods such as high-frequency mechanical impact (HFMI) treatment and local heating. It investigates failure mechanisms using fatigue tests, elastic-plastic FEM analysis, and fracture mechanics.
*Illustrative imageApplying Data Science to Maintenance and Production
The lab monitors the structural response of ship hulls and performs data assimilation with simulation to estimate structural response from a limited number of measurement points. It also has research in which machine learning is applied to the sound of plasma cutting of steel plates so that AI can determine an appropriate replacement interval.
*Illustrative imageQuality Inspection DX (Automating Visual Inspection)
Visual inspection of welded structures relies on the visual judgment of skilled inspectors, which leads to heavy human workload and high inspection costs. The lab is advancing research and development to automate defect detection using automatic shape assessment, AI image analysis, and robotics.
MembersFaculty
The members of the Marine Materials and Production Engineering Lab consist of faculty, project researchers, doctoral, master's, and undergraduate students, and secretaries.As of 2026
- ProfessorSeiichiro Tsutsumi
- Associate ProfessorJunji Sawamura
- Assistant ProfessorTakaaki Takeuchi
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “Shipbuilding, Liverpool 1944” 作者不詳 / Public domain (cropped)
- Structural Durability (Fatigue, Corrosion, Wear): “Blue H Technologies - World's First Floating Wind Turbine” Green Storm 7 / CC BY-SA 4.0 (cropped)
- Mechanisms of Fatigue, Corrosion, and Wear and Life Assessment: “Ship loading in Albert Dock, Kingston upon Hull - geograph.org.uk - 2387805” Leslie / CC BY-SA 2.0 (cropped)
- Applying Data Science to Maintenance and Production: “Strain gauge” Cristian V. / CC BY 4.0 (cropped)
- Quality Inspection DX (Automating Visual Inspection): “ExR-2 Inspection Robot (02)” S.J. de Waard / CC BY-SA 4.0 (cropped)
- Related lab (Ship and Ocean Fluid Engineering Lab): “Convair Negative Image - Tow basin ship model in tank )” San Diego Air & Space Museum Archives / Public domain (cropped)
- Related lab (Ocean Space Development Engineering Lab): “Container ship Reecon Whale on Black Sea near Constanța Romania” HopsonRoad / CC BY-SA 4.0 (cropped)
- Related lab (Ship and Offshore Structural Engineering Lab): “Agucadoura WindFloat Prototype” Untrakdrover / CC BY-SA 3.0 (cropped)
- Related lab (Social Infrastructure Design Lab): “Whittier Bridge- Arch span deck is ready for concrete ( )” MassDOT / Public domain (cropped)
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