Journal of the Japan Society for Composite Materials
Online ISSN : 1884-8559
Print ISSN : 0385-2563
ISSN-L : 0385-2563
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Volume 27, Issue 5
Displaying 1-7 of 7 articles from this issue
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  • [title in Japanese]
    Fu-Kuo Chang
    2001 Volume 27 Issue 5 Pages 219-223
    Published: September 15, 2001
    Released on J-STAGE: August 11, 2009
    DOIhttps://doi.org/10.6089/jscm.27.219
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    Kiyoshi KEMMOCHI
    2001 Volume 27 Issue 5 Pages 224-226
    Published: September 15, 2001
    Released on J-STAGE: August 11, 2009
    DOIhttps://doi.org/10.6089/jscm.27.224
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    Takashi ISHIKAWA
    2001 Volume 27 Issue 5 Pages 227-229
    Published: September 15, 2001
    Released on J-STAGE: August 11, 2009
    DOIhttps://doi.org/10.6089/jscm.27.227
    JOURNAL FREE ACCESS
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  • Eigenvibration Analysis Method for Honeycomb Sandwich Panels
    Tsuyoshi NISHIWAKI, Takahiro SHIOMI, Zen-ichiro MAEKAWA
    2001 Volume 27 Issue 5 Pages 230-236
    Published: September 15, 2001
    Released on J-STAGE: August 11, 2009
    DOIhttps://doi.org/10.6089/jscm.27.230
    JOURNAL FREE ACCESS
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    The honeycomb sandwich panel (HSP) is constructed by two facing plates and honeycomb core. It has been said that the HSP has high specific modulus and strength because of the light core. Nowadays the HSP is applied to structural components in various industrial fields. HSP has lots of geometric parameters, facing thickness, core thickness, wall thickness and cell size and so on. For application of the HSP to structural components, the prediction of its mechanical properties would be very important procedure. In order to investigate influences of the parameters on the mechanical properties of the whole HSP, a simple numerical modeling method is proposed. A modeling method of honeycomb core will be an important key to the numerical modeling of the HSP. Considered the periodicity of honeycomb core, the core and adhesive layer are modeled by two kinds of beam elements. The facing plate is represented by shell elements. In this modeling, a use of the proposed model, eigenvibration analyzes are performed and compared with experimental results. After checking the validity of the proposed model, the influences of geometric parameters upon the eigenvibration properties are quantitatively discussed.
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  • Cure Monitoring of Composite Laminate by Piezoelectric Ceramics
    Nobuo OSHIMA, Kei AOKI, Satoshi UMEMOTO, Sinya MOTOGI, Takehito FUKUDA
    2001 Volume 27 Issue 5 Pages 237-242
    Published: September 15, 2001
    Released on J-STAGE: August 11, 2009
    DOIhttps://doi.org/10.6089/jscm.27.237
    JOURNAL FREE ACCESS
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    The piezoelectric ceramics is embedded in the glass fiber reinforced plastics (GFRP) laminate. A dielectric sensor is also embedded in the GFRP laminate as a reference sensor for the degree of cure. The cure monitoring of the FRP by the piezoelectric ceramics in autoclave processing is experimentally demonstrated. The impedances of the piezoelectric ceramics have strong tempera-ture dependence. However, the impedances of the piezoelectric ceramics can be corrected to the temperature by the exponential function. Thus, the impedances of the piezoelectric ceramics at the non-resonance frequency are adopted as cure index of the GFRP laminate. The change of impedance at non-resonance frequency shows good correspondence with change of the log ion viscosity, which is measured by the dielectric cure monitoring sensor.
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  • Stacking Sequence Optimizations of Bending-Twisting Coupling of Composite Panel Using Fractal-Branch and Bound Method
    Yuichiro TERADA, Akira TODOROKI
    2001 Volume 27 Issue 5 Pages 243-250
    Published: September 15, 2001
    Released on J-STAGE: August 11, 2009
    DOIhttps://doi.org/10.6089/jscm.27.243
    JOURNAL FREE ACCESS
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    Stacking sequence optimization is an important problem in a design of composite panel. Practical composite laminates comprise a small set of available fiber orientations such as 0°, 45°, 90° and -45°plies because of the fabrication process and/or lack of experimental data. The restriction of available fiber orientations makes the stacking sequence optimizations into combinatorial optimization problems. For such combinatorial optimizations, genetic algorithm (GA) is a well known and popular tool. However, the GA is one of probabilistic algorithms and its reliability decreases as increasing the number of plies. In addition, GA requires several parameter tunings. The present study proposes a novel deterministic algorithm, that is named fractal-branch and bound method (FBBM). Using this method, the designers can optimize the bending stiffnesses certainly and immediately without any parameter tunings. In this paper, FBBM is applied to design bending-twisting coupling stiffnesses to show its high efficiency and reliability.
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  • [title in Japanese]
    Kazuaki AMAOKA, Takayuki KAMIYAMA
    2001 Volume 27 Issue 5 Pages 251-254
    Published: September 15, 2001
    Released on J-STAGE: August 11, 2009
    DOIhttps://doi.org/10.6089/jscm.27.251
    JOURNAL FREE ACCESS
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