Research Reports 2002　Up date　2004.2.4
 
Abstracts of Papers     
  1. Prediction of Free Surface Profiles of Sheet-Formed Products Using a Fractal Approach, Masahito MATSUI, Yasushi KUROSAKI, Mir Behdad KHAMESEE and Kenichi MURAI: Journal of the JSTP, Vol. 43, No. 498, pp. 644-648, 2002.

    Free surface profiles of aluminum sheets deformed under three kinds of loading tests (uniaxial and equi-biaxial tensions and shrink flanging) are examined by employing the power spectrum fractal analysis. A method for simulating the surface roughening phenomenon caused by plastic deformation is presented, and its validity is confirmed. The strain dependence of the fractal parameters required for the simulation can be unifiably expressed with the equivalent strain, irrespective of the strain (or stress) ratio. From this, a CAE system for predicting the surface profiles of any press-formed products is proposed and shown to be valid.

  2. Non-Traditional Materials Processing Using Microbiological Actions, Masahito MATSUI, Yasushi KUROSAKI, Yuichi NAKAMURA, Kenichi MURAI and *Toshio KIMURA: Book of Abstracts, Mechanics and Materials in Design, pp. 117-118, 2002.

    A variety of functions which marine microorganisms possess are noted and searched for seeds of developing a new type of materials processing. In general, the actions of microorganisms are classified into production of biogenetic materials, corrosion and deterioration, leaching and accumulation. In the present investigation, our focus is on the first and second actions, and three kinds of bioprocessing based on them are proposed, biomachining, biodeposition and biorecycling..

  3. Fractal Approach for Prediction of Surface Profiles of Sheet-Formed Products, Mir Behdad KHAMESEE, Yasushi KUROSAKI, Masahito MATSUI and Kenichi MURAI: Book of Abstracts, Mechanics and Materials in Design, pp. 175-176, 2002.

    The effects of the strain ratio on surface roughening of aluminum and mild steel sheets deformed under three kinds of loading tests (uniaxial and equi-biaxial tensions and shrink flanging) are examined by employing the power spectrum fractal analysis. Based on these results, a CAE (Computer Aided Engineering) system for predicting free surface profiles of any sheet-formed products, which will serve to provide such surface information as needed for process design is proposed and shown to be valid.

  4. Total Growth Control of a-c Oriented YBCO Thin Films Deposited by IBS, Ken-ichi ITOH, Akinori HASHIZUME, Jiro YAMADA, Hideaki KOHMOTO, Masaomi MATSUO, V.V. SRINIVASU, Tamio ENDO, Masahito MATSUI, Yasushi KUROSAKI, *Hitoshi NAKANISHI and *Kazuhisa NIWANO, Proceedings of the Symposium on Fundamentals of Crystal Growth (2000, Chennai) <Invited>, Recent Trends in Crystal Growth, pp. 1-10, 2002.

    To investigate mechanisms of a-C oriented YBCO thin film growth, the films were deposited on MgO by IBS with various systematic conditions such as substrate temperature, oxygen partial pressure, supply of oxygen molecule or plasma, and surface roughness of the substrates. All the results indicate that the surface migration of deposited particles determines the a-c orientations. The film deposited on rough-surface substrate can verify this mechanism.
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