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  • Introduction of Research Group

    Department: Mechanical Engineering
    Area: Complex Mechanics Area
    Subarea: Solid Mechanics Field

    Research Group Objective:
    Modeling of Multiscale Solid Mechanical Behaviors and Designing of Novel


    - Nanoplasticity by Nanoindentation and Collective Defect Mecahnics
    - Defect Mechanics of Bulk Metallic Glasses
    - Thin Film Growth Modeling
    - Designing and Testing of Nanostrucutres by FIB-CVD
    - Nondestructuve Mesoscopic Observation by New Microscopy
    : Scanning Electron-induced Acoustic Microscpoy (SEAM)
    - Dental Occlusive Mechanics for Oral Engineering

1, Abstract
  • We research the solid mechanics field where much attention is paid to the multi-scale modeling and analyses. In order to link the hierarchical solid mechanics phenomena together, our research field ranges from the first principle calculation (ab-initio calculations) to get the electronic states information under the external loading, the mezoscopic simulations which represent the collective mechanical behavior of defects like the dislocation and the macroscopic elastic-plastic finite element simulations.
    Moreover, we have been put much efforts to perform the noteworthy experiments and to develop the new experimental technique as well. The former is concerning the nano-indentation, the in-situ observation of the mechanical testing. The latter is related to the focus ion beam (FIB) applied technique and the new scanning electron-induced acoustic microscopy (SEAM).
    We have also been collaborating to the dentists. Developing the three-dimensional finite element analyses of the occlusive force and moment balance, our numerical analysis information is coupled with the dental treatments. We aim to build up the ideal occlusive master curved surface from the mechanics standpoint.

Fig.1 Dislocation network observation under nano-indentation of
single crystal silicon or aluminum.

Fig.2 The holder putting the sample of a transistor tip.

2, Main Research Theme
  • (Cellular Automata (CA)+Crystal Plasticity) Combined Scheme,
    3-Dimensional CA Discrete Dislocation Method (3D CA-DD), Dislocation
    Collective Behavior, Molecular Dynamics (MD)
  • Cluster Structure, 0(N) Tight-binding MD (TB-MD), Diamond-Like-Carbon (DLC), Carbon Nanotube, Ab-initia Calculation
  • Scanning Electron Beam-indeed Acoustic Microscopy (SEAM), Dislocation
    Network, Non-destructive Observation, Nano-indentation, Silicon, Phase
    transition and Dislocation Network
  • Occlusion Mechanics, Dental Implant Design, FEM Simulation

3, The Handai (Osaka University is called the "Handai") FRC
  • We participate in one of the Handai FRC projects "Concurrent first principle computational system for structural integrity of nanostructured materials".
    Improving the first principle calculations for practical multinary compounds and non-periodic structures containing some defects, new computational mechanics system with multiscalability has been developed. It can evaluate the material properties of nanostructured materials and also trace dynamics of mechanical structures assembled on nano-scale. The focus ion beam technology is available to innovate the nanostructures. which should be integrated from the nanoengineering view points by the newly developed concurrent computationalmechanics system.
    LINK >>>Project Introduction (PDF 2.04MB)

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