Research Reports 1999　Up date　2003.7.16
 
Abstracts of Papers   
  1. Anisotropic Fractal of Surface Irregularities of Aluminum Sheets Subjected to Uniaxial Tension. Yasushi KUROSAKI, Masahito MATSUI, Katsuhide KUROKI* and Ken ISHIKAWA*: Advanced Technology of Plasticity 1999, Vol. 2, Proc. 6th ICTP, Nuremberg, pp. 1405-1410, 1999.

    Free surfaces of aluminum sheets under uniaxial tension are analyzed by the fractal analysis (power spectrum) method, and the planar anisotropy of fractals is examined. While the new surface produced by elongation provides an in-plane isotropic roughness, it also causes a constant anisotropic fractal. A method for simulating the surface irregularities is presented, and its validity is confirmed. It serves to generate the surface profile curves for any in-plane direction and strain, and to construct three-dimensional surface images by computer.

  2. Laser Light Scattering Measurement of Lubricants at High Pressure and Evaluation of Mechanical Properties  (4th Report, Evaluation of High Viscosity of Solidfied Lubricants by Rayleigh Scattering and Photon Correlation Technique) [in Japanese], Yuichi NAKAMURA, Masayuki TSUNODA*, Tatsuya MATSUI*, and Ikuya FUJISHIRO*: Trans. of JSME, Ser. C, 65-635, pp.2886-2891, 1999.

    A new viscosity measuring system was designed and set up employing Rayleigh light scattering and a photon correlation technique using a diamond-anvil high-pressure cell. Two kinds of experiments were attempted. The one was the measurement for dilute suspensions of polystyrene latex spheres in liquid lubricants and a W/O emulsion. The other experiment was the measurement for 5P4E (polyphenyl ether) and DOP (dioctylphthalate) without mixing polystyrene spheres. Very weak but observable correlation functions concerning structural relaxation were observed and the viscosities of solidified lubricants (about 109 Pa･s), obtained in very short time, were consistent with data of falling body method.

Abstracts of Books and Reviews

  1. Nanoprocessing Division, Faculty of Engineering, Mie University [in Japanese], Yasushi KUROSAKI, Yuichi NAKAMURA, Masahito MATSUI: J. Japan Soc. of Tribologist, Vol. 44, No. 8, pp. 614, 1999.

    This review introduces researches of nanoprocessing division of physics engineering in Mie University. In this division, micro-nano processing and tribology concerning mechanical engineering are studied. Main research items are as follows; 1) non-traditional process of metals using bacteria, 2) application of fractal analysis to plastic forming, 3) evaluation of viscosity and shear modulus of lubricant oils at high pressure, 4) mechanics of unsymmetrical extrusion.

  2. Application of Fractal Approach to Surface Problems in Metal Forming [in Japanese], Yasushi KUROSAKI and Masahito MATSUI: Journal of the JSTP, Vol. 40, No. 462, pp. 635-639, 1999.

    Fractal analysis methods applicable to surface problems in metal forming are introduced. The fractal analyses are applied to free surface roughening of sheet metal and adhesion phenomena in metal forming, and characteristics of various fractal dimensions are discussed.
    Surface-roughening behavior and adhesion feature are simulated by computer.

  3. Environmental Problems and Measures in Manufacturing Industries [in Japanese], Yasushi KUROSAKI: Research Report of Isology for International Standard, Vol.1, pp.203-208, 1999.

    Results of an investigation into environmental problems and taken measures in manufacturing industries are reported. In regard to recycle of materials, systematic projects and efforts have been promoted. Trends and various countermeasures taken in machining, metal forming
    and tribology are also reviewed.

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