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Ushijima Lab
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A lab that investigates the strength and thermal properties of lightweight structures through simulation and 3D printing.
AboutAbout the lab
For using materials without waste, and safely.
The Ushijima Lab studies mechanics of materials in order to use materials without waste and safely.
Combining numerical simulation with fabrication by 3D printer, the lab works on the design and development of lightweight structures.
For thin-walled lightweight structures such as lattices and honeycombs, the lab analyzes stiffness, strength, and other properties by computer and builds theoretical models to evaluate their properties.
The lab also prints test specimens with a 3D printer and verifies the results through experiments.
Key terms
- Lattice structure
- A type of periodic cellular structure in which slender beams are arranged three-dimensionally. It is light and has excellent stiffness and strength.
- Structural optimization
- A procedure for finding the structure that delivers the required performance to the greatest extent under given constraints.
- Open-cell structure
- A cellular structure. When it is sandwiched between two face sheets, air for cooling can flow through its interior.
ResearchResearch themes
Materials used in structures such as automobiles and aircraft are required to be as light as possible while also having high stiffness, high strength, and high impact absorption. The lab analyzes thin-walled lightweight structures such as lattices, honeycombs, and foams by computer, and builds theoretical models for evaluating their properties based on how they deform, with the aim of providing guidelines for weight reduction and improved safety.
*Illustrative imageMechanical properties of lattice structures
These are lightweight structures in which slender beams are arranged three-dimensionally, and their properties change with the diameter and arrangement of the beams. The lab investigates stiffness and strength as well as acoustic, vibration, and heat transfer and fluid flow properties, through both numerical simulation and experiments.
*Illustrative imageOptimization of lightweight structures
The lab uses structural optimization, a mathematical procedure, to find structures that are lighter and more resistant to deformation. It is the first to apply this optimization to lattice structures, and it verifies the results, including through experiments.
*Illustrative imageHeat transfer and fluid flow properties of open-cell structures
The outer skin of a vehicle re-entering the atmosphere from space becomes hot from frictional heating, and buckling occurs once the temperature exceeds a certain level. As a structure to prevent this, the lab studies an open-cell structure sandwiched between two face sheets.
MembersFaculty
The members of the Ushijima Lab are faculty members, master's students, and undergraduate students.As of 2025
- ProfessorKuniharu Ushijima
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: “Imprimante 3D” Adoscam / CC BY-SA 4.0 (cropped)
- Mechanical properties of lattice structures: “3D printed wall” COBOD / CC BY-SA 4.0 (cropped)
- Optimization of lightweight structures: “3D printed bioglass lattice” Ezra Feilden / CC BY-SA 4.0 (cropped)
- Heat transfer and fluid flow properties of open-cell structures: “Metal foam - big porosity” Blanchet matthieu / CC BY-SA 3.0 (cropped)
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