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Yoshikawa Lab
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A lab that uses computer simulation to evaluate the strength of composite materials such as carbon fiber composites.
AboutAbout the lab
Evaluating the strength of composite materials with the finite element method.
Yoshikawa Lab studies methods for evaluating the strength of composite materials such as carbon fiber reinforced plastic (CFRP), as well as methods for optimal design.
The finite element method has been of great help in examining the strength of machines and structures made of metal.
However, for materials like CFRP whose properties vary from place to place, no established method existed for building strength models from experiments.
The lab is therefore working on a method that models carbon fiber bundles and resin separately in fine detail and examines strength by computer.
Key terms
- Finite element method
- A method that divides the shape of an object into small elements and uses a computer to calculate how forces are applied and how the object deforms
- CFRP
- Carbon fiber reinforced plastic. A composite material made by binding carbon fibers with resin
- Mesoscale
- A scale of size between the whole material and its atoms. Here, a size at which fiber bundles and resin can be told apart
ResearchResearch themes
The lab models materials with non-uniform properties, such as CFRP, by separating them into fiber bundles and resin and applying the finite element method, and studies methods for strength evaluation and optimal design. Its targets are components made of CFRP, such as high-pressure hydrogen vessels and jet engine parts.
*Illustrative imageA simulator for evaluating the strength of composite materials
To evaluate the strength reliability of CFRP at the design stage, the lab developed a simulator that models fiber bundles and resin separately and calculates how molding, curing, and damage progress in each.
*Illustrative imageUltra-high-pressure hydrogen vessels made of CFRP
For the pressure accumulators used at hydrogen stations for fuel cell vehicles, the lab used simulation to quantify the relationship between defects that arise during manufacturing and burst strength, making rational optimal design possible.
*Illustrative imageJet engine fans made of CFRP
To develop jet engine fans made of CFRP that are lightweight and resistant to impact, the lab is investigating how to examine the mechanisms of fracture using the mesoscale finite element method and obtain guidelines for material design.
MembersFaculty
Yoshikawa Lab's members consist of faculty, technical staff, researchers, and doctoral and master's students.
- ProfessorNobuhiro YoshikawaPublications ↗
- Project ProfessorShinichiro TakemotoPublications ↗
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: “Carbon fibre weave” Christine Twigg / CC BY-SA 4.0 (cropped)
- A simulator for evaluating the strength of composite materials: “AFP Prepreg” Jota Machinery / CC BY-SA 4.0 (cropped)
- Ultra-high-pressure hydrogen vessels made of CFRP: “Toyota Mirai high-pressure hydrogen tank SAO” Mariordo (Mario Roberto Durán Ortiz) / CC BY-SA 4.0 (cropped)
- Jet engine fans made of CFRP: “Air intake, fan and compressor of sectioned Rolls-Royce Turboméca Adour turbofan 01” Olivier Cleynen / CC BY-SA 3.0 (cropped)
- Related lab (Umeno Lab): “SEM-image-showing-crack-propagation-of-TaCCNTsSiC” Qiaoyun Xie, Sylvanus N. Wosu / CC BY 4.0 (cropped)
- Related lab (Izumi-Hatano Lab): “Steel wire rope on a drum” W.carter / CC0 (cropped)
- Related lab (Tochigi Lab): “Ernst Ruska Electron Microscope - Deutsches Museum - Munich-edit” J Brew, uploaded on the English-speaking Wikipedia by en:User:Hat'nCoat. / CC BY-SA 3.0 (cropped)
- Related lab (Furushima Lab): “EBSD orientation map of ferrous lath martensite” Tiberio / CC BY-SA 4.0 (cropped)
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