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 16, Issue 4
Displaying 1-7 of 7 articles from this issue
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  • [title in Japanese]
    Masayuki ITO, Takao SUZUKI, Masako NAKAHASHI, Hiromitsu TAKEDA
    1990 Volume 16 Issue 4 Pages 123-131
    Published: July 15, 1990
    Released on J-STAGE: August 11, 2009
    DOIhttps://doi.org/10.6089/jscm.16.123
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    1990 Volume 16 Issue 4 Pages 131a
    Published: July 15, 1990
    Released on J-STAGE: August 11, 2009
    DOIhttps://doi.org/10.6089/jscm.16.131a
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    Kazuo MATSUYAMA, Yoshimasa NAKAGAWA
    1990 Volume 16 Issue 4 Pages 132-138
    Published: July 15, 1990
    Released on J-STAGE: August 11, 2009
    DOIhttps://doi.org/10.6089/jscm.16.132
    JOURNAL FREE ACCESS
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  • Analysis of Transverse Stress-Strain Behavior of Unidirectional and Continuous Fiber Reinforced Metal
    T. HISAYAMA, H. YOON, K. TAKAHASHI
    1990 Volume 16 Issue 4 Pages 139-146
    Published: July 15, 1990
    Released on J-STAGE: August 11, 2009
    DOIhttps://doi.org/10.6089/jscm.16.139
    JOURNAL FREE ACCESS
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    The transverse stress-strain relation of the unidirectional fiber composite is investigated theoretically taking into account of the matrix yielding and the interfacial adhesion. The matrix yielding is determined by the average tensile stress in the matrix. Three types of the fiber/matrix interfacial bondings are considered ; (1) perfect adhesion, (2) interfacial slippage and (3) cavity formation. Numerical results are compared with the experimental data on the unidirectional Boron fiber/Aluminum composite reported by Kyono et al., and the following conclusions are obtained. The stress applied to the composite corresponding to the matrix yielding increases gradually with the increase of the fiber volume fraction (Vf). Comparing with this increase of the stress applied to the composite, the transverse Young's modulus of the composite increases more rapidly as Vf increases. Therefore, the strain of the composite corresponding to the matrix yielding decreases remarkably with the increase of Vf. Because the radial tensile stress at the fiber/matrix interface is larger for Vf=30% than for Vf=50%, the interface is easy to be debonded and to form the cavity for Vf=30%.
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  • Extension of the Interfacial Slippage Model to the Unidirectional Fiber Composite Reinforced with Transversely Isotropic Fiber
    K. TAKAHASHI, T. HISAYAMA, H. YOON, K. NAKAJIMA
    1990 Volume 16 Issue 4 Pages 147-154
    Published: July 15, 1990
    Released on J-STAGE: August 11, 2009
    DOIhttps://doi.org/10.6089/jscm.16.147
    JOURNAL FREE ACCESS
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    In a preceding paper, the interfacial slippage model of the unidirectional fiber composite was developed assuming that the fiber and the matrix were both isotropic. By the use of this model, the elastic moduli and the stress distribution in the transverse cross-section of the composite can be predicted. In this paper, the interfacial slippage model has been extended to the composite reinforced with transversely isotropic fiber. The predicted transverse Young's moduli of the unidirectional carbon fiber/PEEK composites are compared with the experimental results. In the experiment, two types of unidirectional carbon fiber/PEEK composites are prepared : (a) from prepreg sheet and (b) from the cloth woven using the warp of carbon fiber and the weft of PEEK fiber. The transverse Young's modulus of the specimen (a) coincides with the theoretical results assuming the perfect adhesion at the carbon fiber/PEEK interface. On the other hand, the experimental result, of specimen (b) rather coincides with the theoretical prediction based on the interfacial slippage model.
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  • Strength of Mechanically Fastened Joint in Flat Braided Composite
    H. HAMADA, Z. MAEKAWA, A. YOKOYAMA, A. FUJITA
    1990 Volume 16 Issue 4 Pages 155-162
    Published: July 15, 1990
    Released on J-STAGE: August 11, 2009
    DOIhttps://doi.org/10.6089/jscm.16.155
    JOURNAL FREE ACCESS
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    It is often mentioned that braided fabric is useful as one of techniques to realize the concept of near-net shape in the reinforcement configuration of composite materials. One of important problems in composite structures is how to connect this material with other structures. It is well known that the unskillful design of joints often causes the bearing capacity of composite structure to be reduced, even if each member in structures possesses the sufficient strength and stiffness. Therefore, a particular attention is required in designing the connection or the joints of composite structures. In this paper, we discuss the joint strength of specimen with braided hole reinforced with fibers around hole. The flat bar specimens are fabricated with glass fiber and epoxy resin by hand lay up method. The flat bar contain one braided hole. To compare joint performance between braided hole and machined hole, the specimens with machined hole are prepared. Joint test in tension are carried out. Bearing failure which doesn't lead to catastrophic fracture always occurs at any joint geometries in the case of braided hole. Braided hole can be realized high joint performance with small joint geometry.
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  • French-Japanese Seminar on Composite Materials
    Processing, Use and Databases
    Kiyoshi KEMMOCHI
    1990 Volume 16 Issue 4 Pages 163-165
    Published: July 15, 1990
    Released on J-STAGE: August 11, 2009
    DOIhttps://doi.org/10.6089/jscm.16.163
    JOURNAL FREE ACCESS
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