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Structural Mechanics Lab
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A lab that studies the strength and failure of advanced aerospace materials such as CFRP.
AboutAbout the lab
Creating new material structures and evaluation methods.
The Structural Mechanics Lab studies the strength and failure of advanced materials used in aerospace, such as carbon fiber reinforced plastic (CFRP) and nanocomposites.
The lab investigates how to evaluate and improve materials' strength, fracture, and fatigue properties, and aims to create new aerospace structures using them.
In addition to experiments such as strength tests, the lab develops evaluation methods using lasers and ultrasound, and works on numerical simulation.
Key terms
- Carbon fiber reinforced plastic (CFRP)
- A material made of thin carbon fibers set in resin. It is light and strong, and is used in parts such as aircraft main wings and tail wings.
- Fracture toughness
- The degree to which a material with a crack resists crack growth and is hard to break.
- Finite element method
- A method that divides a shape into small elements and approximately calculates force and deformation by computer.
- Elastic constant
- A value that shows how hard a material is to stretch or compress when force is applied.
NewsLab news
A master's student won the Outstanding Presentation Award at the interim master's thesis presentation
A master's student won the Outstanding Presentation Award at the interim master's thesis presentation
A master's student won the Outstanding Presentation Award at the interim master's thesis presentation
A student won the Best Presentation Award at the Student Member Graduation Research Presentation Meeting of the Japan Society of Mechanical Engineers Tokai Branch
A master's student won the Young Researcher Outstanding Presentation Fellow Award at the M&M2023 Materials Mechanics Conference
ResearchResearch themes
The lab studies how to evaluate and improve the strength, fracture, and fatigue properties of advanced aerospace materials, and how to build new structures with them. In addition to material testing, it works on evaluation methods using ultrasound and lasers, and on numerical simulation.
*Illustrative imageCharacterizing CFRP
For CFRP laminates used as aircraft structural material, the lab conducts strength tests, fracture toughness tests, and fatigue crack growth tests to evaluate their properties. It also performs numerical simulation using the finite element method and the boundary element method.
*Illustrative imageCarbon Nanotube-Reinforced Composites
The lab makes resin composites containing carbon nanofibers or carbon nanotubes, and evaluates their strength and their electrical and thermal conductivity. In particular, it focuses on CFRP in which the resin is reinforced with these materials, and is considering its application to structural materials for automobiles and aircraft.
*Illustrative imageMaterial Evaluation Using Resonance
The lab studies resonant ultrasound spectroscopy, which measures elastic and viscoelastic constants by using a material's resonance. It has built a prototype experimental setup using piezoelectric elements and, by combining numerical analysis with a genetic algorithm, is exploring a method to determine the constants of anisotropic materials, whose properties differ by direction, with high accuracy.
*Illustrative imageMaterial Evaluation Using Laser Ultrasonics
The lab studies methods that direct a laser at a material to generate ultrasound inside it, and determine properties such as strength from its reflection and interference. It works on methods to determine the adhesion strength of coating films and the strength against delamination between layers.
MembersFaculty
The Structural Mechanics Lab consists of faculty members, administrative staff, and doctoral, master's, and undergraduate students.As of 2026
- ProfessorMasahiro Arai
- Associate ProfessorKeita Goto
- Assistant ProfessorTatsuyoshi Hashimoto
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: “" 13 Fiat-Chrysler - Safety - Body Exterior Carbon Fiber Composite Roof Assembly SRT Viper” spe.automotive / CC BY 2.0 it (cropped)
- Characterizing CFRP: “Carbonsheetwiki1” Racingjeff / CC BY-SA 3.0 (cropped)
- Carbon Nanotube-Reinforced Composites: “Types of Carbon Nanotubes” User Mstroeck on en.wikipedia / CC BY-SA 3.0 (cropped)
- Material Evaluation Using Resonance: “Ultrasonic Testing Machine showing readings” Abhijit Nandi / CC BY-SA 3.0 (cropped)
- Material Evaluation Using Laser Ultrasonics: “Nondestructive testing Prommashkomplekt” Balashka at Russian Wikipedia / CC0 (cropped)
- Related lab (Advanced Composite Materials Lab): “Forged Composite look on prototype engine bay cover” Bw570 / CC BY-SA 4.0 (cropped)
- Related lab (Solid Mechanics Lab): “Buckledmodel” Grahams Child / CC BY-SA 3.0 (cropped)
- Related lab (Computational Mechanics Lab): “Meshing in Finite Element Analysis” Abhiram vs 24 / CC BY-SA 4.0 (cropped)
- Related lab (Thermal Control Engineering Lab (1)): “NASA’s Pandora Mission Closer To Probing Alien Atmospheres (SVS14754)” NASA/Weston Maughan, BCT / Public domain (cropped)
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