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 12, Issue 1
Displaying 1-7 of 7 articles from this issue
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  • [title in Japanese]
    [in Japanese]
    1986 Volume 12 Issue 1 Pages 1
    Published: January 15, 1986
    Released on J-STAGE: August 11, 2009
    DOIhttps://doi.org/10.6089/jscm.12.1
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    Shigeo MATSUURA, Masashi FUJII
    1986 Volume 12 Issue 1 Pages 2-7
    Published: January 15, 1986
    Released on J-STAGE: August 11, 2009
    DOIhttps://doi.org/10.6089/jscm.12.2
    JOURNAL FREE ACCESS
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  • Longitudinal Material Nonlinear Properties of Unidirectional Carbon Composites
    T. ISHIKAWA, M. MATSUSHIMA, Y. HAYASHI
    1986 Volume 12 Issue 1 Pages 8-15
    Published: January 15, 1986
    Released on J-STAGE: August 11, 2009
    DOIhttps://doi.org/10.6089/jscm.12.8
    JOURNAL FREE ACCESS
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    Uniaxial tensile tests of UD carbon/epoxy and carbon PEEK coupons are conducted in the longitudinal direction. It is observed that the longitudinal modulus increases with axial stress or strain up to the intermediate level of tension. A fractional constitutive relation with a quadratic denominator is derived from the manner of the theory of nonlinear elasticity. This equation adopting the estimated higher order compliance coefficients exhibits an excellent agreement with the experimental results. An empirical strain-based equation is also proposed as asimpler alternative. Averaging formulas for both types of relations are provided for a practical application. The present phenomenon includes the behavior in a lower stress region discovered by some early work. The consideration of the present nonlinear behavior fairly improves a correlation between theory and experiments in stress-strain relationships of fabric composites with carbon fibers.
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  • Effect of Chemical Structure and Temperature on Corrosion Behavior of Thermosetts
    K. OGASAWARA, K. TSUDA, H. HOJO
    1986 Volume 12 Issue 1 Pages 16-22
    Published: January 15, 1986
    Released on J-STAGE: August 11, 2009
    DOIhttps://doi.org/10.6089/jscm.12.16
    JOURNAL FREE ACCESS
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    Corrosion behavior of four kinds of thermosetts as a matrix of corrosion resistant FRP was studied with special attention to their chemical structures. Immersion tests were carried out at various temperatures in 10 wt% NaOH solution up to 3, 000 hr. As a result of testing, corrosion behavior and also mechanism by hydrolysis were found to be affected greatly by the structure of the resin. In iso-phthalic unsaturated polyester resin, degradation of main polymer chain takes place, while crosslinked polymer chain remains unaffected. Thus elastic soft corroded surface layer is formed. In novolack type vinyl ester resin, only at the ester bonds between main and crosslinked chains are attacked from the viewpoint of the structure. However, dense and tight corroded layer in an appearance is formed with longer immersion time which seems to be an incubation period, and severe lowering of strength occured. As for epoxy resins, the one cured by MDA shows no sign of corrosion because of no ester bonding, while the one cured by MTHPA both main and crosslinked chains are dissolved easily as low molecular weight corrosion products, therefore the specimen thickness decreases uniformly.
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  • [title in Japanese]
    Nobuo TAKEDA
    1986 Volume 12 Issue 1 Pages 23-37
    Published: January 15, 1986
    Released on J-STAGE: August 11, 2009
    DOIhttps://doi.org/10.6089/jscm.12.23
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    Hiroshi HATTA
    1986 Volume 12 Issue 1 Pages 38-39
    Published: January 15, 1986
    Released on J-STAGE: August 11, 2009
    DOIhttps://doi.org/10.6089/jscm.12.38
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    1986 Volume 12 Issue 1 Pages 41-46
    Published: January 15, 1986
    Released on J-STAGE: February 08, 2010
    DOIhttps://doi.org/10.6089/jscm.12.41
    JOURNAL FREE ACCESS
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