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Arai Lab
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A lab developing materials technology for coexisting with natural disasters, based on the strength and failure behavior of materials.
AboutAbout the lab
Materials technology for coexisting with natural disasters.
The Arai Lab conducts analytical and experimental research on mechanics of materials, elasticity, plasticity, damage mechanics, and interface mechanics.
The lab's keyword is "materials technology for coexisting with natural disasters," and developing this technology is its major research goal.
The lab works on damage assessment of components used at high temperatures, such as gas turbines, and on developing testing machines that measure the strength of thin coatings.
Key terms
- Damage mechanics
- A field of mechanics that deals with the process by which flaws and cracks accumulate in a material or component until it fails
- Thermal barrier coating
- A ceramic or similar coating applied to the surface of components exposed to high temperatures to protect them from heat
- Transpiration cooling
- A cooling technique that uses a porous coating and cooling air to lower the surface temperature of a component
ResearchResearch themes
The Arai Lab investigates the behavior of various materials under extreme environments and the physical mechanisms of fracture. Using both analysis and experiments, it studies damage assessment of high-temperature components in gas turbines and thermal power generation equipment, as well as the effects of volcanic ash assuming an eruption of Mt. Fuji.
*Illustrative imageAnalysis techniques for predicting rotor blade damage
The lab develops analysis techniques that predict inelastic deformation and the initiation and progression of damage. The targets are cracks in the rotor blades of power-generation gas turbines and aircraft engines, and crack initiation and delamination in their surface coatings.
*Illustrative imagePorous ceramic thermal barrier coatings
The lab is developing porous ceramic thermal barrier coatings, which are essential for transpiration cooling in various high-temperature equipment. In joint research with a manufacturer, a new mixed powder is used as the raw material, and the coating can be formed easily and at low cost by plasma spraying.
*Illustrative imageA testing machine for measuring the strength of thin materials
The lab is developing a micro-tester that can examine the stress-strain relationship, fatigue life, and crack propagation of thin, small materials such as thin films and coatings.
*Illustrative imageEvaluating coating quality and bonding strength
Using indentation testing, the lab attempts to link film properties of coatings, such as elastic modulus, with their microstructure. It is also studying a method of evaluating the bonding strength at the interface with the substrate from cracks produced by pressing the indenter of a Vickers hardness tester into the interface.
MembersFaculty
The members of the Arai Lab are faculty, a visiting professor, a secretary, and research students.
- ProfessorMasayuki Arai
- Assistant ProfessorYuxian Meng
VoicesStudent voices
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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: “IGT Blades” Nabonaco / Public domain (cropped)
- Analysis techniques for predicting rotor blade damage: “Repair process for a V2500 high-pressure turbine guide vane (10)” Olivier Cleynen / CC BY-SA 3.0 (cropped)
- Porous ceramic thermal barrier coatings: “Ceramic coating on valve stem” Optimi3e / CC BY-SA 4.0 (cropped)
- A testing machine for measuring the strength of thin materials: “Inspekt desk 50kN IMGP8563” Smial / CC BY-SA 2.0 de (cropped)
- Evaluating coating quality and bonding strength: “Passive Charge Dissipating Work Function Matching Coating for Reducing Adhesion of Lunar Dust (GRC-2025-C-00375)” NASA Glenn Research Center / NASA/GRC/Sara Lowthian-Hanna / Public domain (cropped)
- Related lab (牛島研究室): “Imprimante 3D” Adoscam / CC BY-SA 4.0 (cropped)
- Related lab (井上研究室): “UV Cured Powder Coating on Carbon Fiber” Speedoflight1 / CC BY-SA 4.0 (cropped)
- Related lab (林研究室): “Bolt Self-Driving Car” Alexander Corkhill / Public domain (cropped)
- Related lab (小林研究室): “Hybrid Assistive Limb” Steve Jurvetson / CC BY 2.0 (cropped)
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