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Okada Lab
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A computational mechanics lab that uses computers to analyze the deformation of solids and the growth of cracks.
AboutAbout the lab
Analyzing cracks and fracture with computational solid mechanics
The Okada Lab centers on computational solid mechanics, using computers to analyze how solids deform and how bodies containing cracks fracture.
The lab proposes new methods for fracture mechanics analysis and solid mechanics analysis, aiming to contribute to the further advancement of CAE.
Graduate students and undergraduate students doing their graduation research study continuum mechanics of solids, fracture mechanics, computer algorithms, programming, and the theory of the finite element method.
Research progress meetings and a reading seminar on English-language textbooks are held every week, and the lab's guiding policy is to dig deeply into "why?"
Key terms
- CAE
- Short for Computer Aided Engineering. Technology that uses computers to support design and analysis.
- Finite element method
- A representative method in computational solid mechanics that divides an object into small elements to calculate deformation and forces.
- Crack
- A fracture that has formed in an object. In fracture mechanics, researchers analyze how it grows and how forces are distributed around it.
ResearchResearch themes
The Okada Lab centers on computational solid mechanics and works on proposing new methods for fracture mechanics analysis and solid mechanics analysis. Its research covers analysis methods for bodies containing cracks, development of analysis software, automatic generation of analysis models, and computational algorithms for nonlinear problems.
*Illustrative imageComputational methods for evaluating cracks
The lab develops methods that accurately compute crack parameters, such as the stress intensity factor and the J-integral, using tetrahedral finite elements. The scope has expanded from linear elastic problems to large-deformation elastoplastic problems, and further to functionally graded materials.
*Illustrative imageDeveloping practical fracture mechanics analysis software
The lab has developed practical software by combining an automatic mesh generation program for three-dimensional cracks with a fracture mechanics parameter analysis program for tetrahedral finite elements. Crack growth analysis under the influence of welding residual stress is becoming possible.
*Illustrative imageAutomatic generation of cracked analysis models
This research creates analysis models containing cracks through automatic mesh generation, as a building-block technology for practical fracture mechanics analysis with the finite element method. Using the constrained Delaunay method, it aims at analyses in which many cracks of arbitrary shape grow simultaneously.
*Illustrative imageComputational algorithms for nonlinear problems
The lab studies new computational algorithms for nonlinear solid mechanics, including methods that are robust despite high computational cost and methods that make analysis models easy to build. The work includes the iterative overlapping mesh method, the MDP finite element method, and isogeometric analysis.
MembersFaculty
The members of the Okada Lab consist of faculty, master's students, undergraduate students, and a secretary.As of 2023
- ProfessorHiroshi Okada
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: “Harmonic Analysis of Impeller” Ajay B. Harish / CC BY-SA 4.0 (cropped)
- Computational methods for evaluating cracks: “Cracked concrete - Preview (Dimitrios Savva via Poly Haven” Dimitrios Savva / CC0 (cropped)
- Developing practical fracture mechanics analysis software: “3D Finite Element Analysis (FEA) Sherlock Automated Design AnalysisTM Software image” Craig Hillman, PhD, CEO DfR Solutions / CC BY-SA 3.0 (cropped)
- Automatic generation of cracked analysis models: “Finite element mesh” Bruno Sudret / CC BY 4.0 (cropped)
- Computational algorithms for nonlinear problems: “Triangulation with edge midpoints” Grawiuton / CC0 (cropped)
- Related lab (松崎研究室): “HD2-400 x 3 Molding Press” Sam D. Wilbur / CC BY-SA 4.0 (cropped)
- Related lab (高橋研究室): “Electrolytic copper metal crystals” Frey Saori / CC BY-SA 3.0 (cropped)
- Related lab (荻原研究室): “Embroidered composite reinforcement” Elkágyé / CC BY-SA 4.0 (cropped)
- Related lab (荒井研究室): “NIST Dexterous Manipulation Testbed ( )” National Institute of Standards and Technology / Public domain (cropped)
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