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 4, Issue 3
Displaying 1-8 of 8 articles from this issue
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  • [title in Japanese]
    [in Japanese], [in Japanese]
    1978 Volume 4 Issue 3 Pages 93-99
    Published: July 31, 1978
    Released on J-STAGE: August 11, 2009
    DOIhttps://doi.org/10.6089/jscm.4.93
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese], [in Japanese]
    1978 Volume 4 Issue 3 Pages 99-104
    Published: July 31, 1978
    Released on J-STAGE: August 11, 2009
    DOIhttps://doi.org/10.6089/jscm.4.99
    JOURNAL FREE ACCESS
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  • Elastic Moduli and Yield Strength of Glass Fabric Reinforced Plastic Laminates
    O. HAGA
    1978 Volume 4 Issue 3 Pages 105-111
    Published: July 31, 1978
    Released on J-STAGE: August 11, 2009
    DOIhttps://doi.org/10.6089/jscm.4.105
    JOURNAL FREE ACCESS
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    It is assumed that elastic properties of glass fabric reinforced plastic laminates are affected by three factors, i.e, the deflection angle, the pitch and the density of warp and weft of the fabrics. The elastic moduli of glass fabric reinforced plastic laminate are calculated by a crossply laminate model consisting of many unidirectional reinforced monolayers at right angles to each other. The mechanical properties of the monolayer are estimated by considering the three factors. The elastic moduli of this model are analyzed by using “laminated plate theory”, and the macroscopic failure criterion is discussed based on the maximum stress theory and the strain energy theory. The elastic moduli and the yield stresses of three foundation weave fabric laminates (plain weave, twill weave and satin weave) are measured experimentally. The calculated values agree fairly with those of experiments, and it is concluded that the analytical method presented in the paper is useful to predict the elastic moduli and the yield strength of glass fabric reinforced plastic laminates.
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  • Study on the Deformation Mechanism of Glass Fiber Reinforced Plastic
    Part II On the Debonding and Fracture of Yarn by Half-wedge Indenters
    H. INOUE, M. IDO
    1978 Volume 4 Issue 3 Pages 112-118
    Published: July 31, 1978
    Released on J-STAGE: August 11, 2009
    DOIhttps://doi.org/10.6089/jscm.4.112
    JOURNAL FREE ACCESS
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    The indentation of unidirectional glass fiber reinforced plastic materials by half-wedge indenters was accomplished. The whitening patterns being produced by indenting are classified into two categories which these are fractured part perfectly and the failure part involving some defects for glass yarns in view of fracture behavior. The distribution of failure pattern (whitening pattern) defined are observed on various relative angle between the wedge face and the direction of yarn in composites and those are compared with that of full wedge indenter mentioned in previous paper. The main results obtained are as follows : (1) The failure pattern by half-wedge indenter dose not show the peculiar behavior presented in the case of full wedge indenter. (2) According as the wedge angle increase, the fracture part spreads in the vertical direction of wedge face in the case of full wedge indenter, while spreads under the indenter in the case of half-wedge indenter. (3) The fracture of yarn occurs in a combination of horizontal stress acting in the direction of fiber and bending moment, whereas failure of yarn occurs with stress acting vertically to the yarn orientation.
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  • Elastic Moduli of CFRP-Composite and Epoxy-Resin at High Temperature
    T. ISHIKAWA, K. KOYAMA, S. KOBAYASHI
    1978 Volume 4 Issue 3 Pages 119-124
    Published: July 31, 1978
    Released on J-STAGE: August 11, 2009
    DOIhttps://doi.org/10.6089/jscm.4.119
    JOURNAL FREE ACCESS
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    In the temperature range from room temperature to the glass-transition point (Tg) of matrix, elastic moduli of CFRP-UD composites, CFRP-FW cylinders and Epoxy resin are measured. An electro-optical extensometer, Zimmer model 200 X, is used in these experiments. Experimental results of Ex are compared with the numerical results by the authors' computer program based on measured data for Epoxy and an agreement is very good. Temperature dependency of Ex is directly influenced by that of Em, but Ez is almost independent of Em. It should be noted that νm has considerable effect on Ex, particularly at near Tg point. Curing temperature history changes trends of temperature dependency of Em at most Epoxy.
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  • [title in Japanese]
    1978 Volume 4 Issue 3 Pages 125-128
    Published: July 31, 1978
    Released on J-STAGE: February 08, 2010
    DOIhttps://doi.org/10.6089/jscm.4.125
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    1978 Volume 4 Issue 3 Pages 132
    Published: July 31, 1978
    Released on J-STAGE: August 11, 2009
    DOIhttps://doi.org/10.6089/jscm.4.132
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    1978 Volume 4 Issue 3 Pages 132a
    Published: July 31, 1978
    Released on J-STAGE: August 11, 2009
    DOIhttps://doi.org/10.6089/jscm.4.132a
    JOURNAL FREE ACCESS
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