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 22, Issue 5
Displaying 1-4 of 4 articles from this issue
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  • [title in Japanese]
    Masahiko UEMURA
    1996 Volume 22 Issue 5 Pages 165-173
    Published: September 15, 1996
    Released on J-STAGE: August 11, 2009
    DOIhttps://doi.org/10.6089/jscm.22.165
    JOURNAL FREE ACCESS
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  • Shear Property of 3D Braided Composite
    Hiroshi TAMAKI, Mitsuaki MATSUMOTO, Masahiko KIMBARA, Kenji FUKUTA
    1996 Volume 22 Issue 5 Pages 174-183
    Published: September 15, 1996
    Released on J-STAGE: August 11, 2009
    DOIhttps://doi.org/10.6089/jscm.22.174
    JOURNAL FREE ACCESS
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    Shear property of 3D braided composites with various thickness and fiber-angle, which were fabricated using carbon fiber and epoxy resin was measured using V-notch beam specimens (modified Iosipescu method). The shear strength and modulus (τZX, GZX respectively) in the plane containing braid axis (Z) were fairly higher than those of the in-plane shear properties of traditional unidirectional (UD) laminates and increased with the braiding angle up to 45°. On the other hand shear property in the plane perpendicular to the braid axis (τXY and GXY) was shown to be as low as out-of-plane property of the UD laminates. Anisotropic shear property of the specimen depending on the load direction was observed. Strength and modulus determined under the load vertical to the braid direction, (GZXL, σZXL respectively) were higher than those in the case of horizontal (GZXT, σZXT respectively). Especially the shear strength differed by a factor of 3.
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  • Statistical Evaluation of Compressive Mechanical Properties of a T800H/PMR-15 Carbon/Polyimide Composite
    Toshiyuki SHIMOKAWA, Yasumasa HAMAGUCHI, Yoshiaki KAKUTA
    1996 Volume 22 Issue 5 Pages 184-192
    Published: September 15, 1996
    Released on J-STAGE: August 11, 2009
    DOIhttps://doi.org/10.6089/jscm.22.184
    JOURNAL FREE ACCESS
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    The objective of this study is to statistically evaluate the compressive mechanical properties of a quasi-isotropic carbon/polyimide composite, i.e., T800H/PMR-15 with a stacking sequence (45/0/-45/90)4S of 32 plies. Compression tests were conducted at room temperature using thirty smooth specimens. Mechanical properties measured are ultimate strength, failure strain, elastic modulus in addition to specimen thickness. Statistical analyses use four kinds of distribution models such as the normal, log-normal, type-I extreme-value, and two-parameter Weibull distributions. These analyses derive the estimates of central tendencies and scatter parameters, and B allowables. The modified Kolmogorov-Smirnov goodness-of-fit tests and graphical plotting techniques are applied to test the goodness-of-fit of each mechanical property data for the four kinds of distribution models. Correla-tion between mutual mechanical properties is examined, and a multiple regression analysis is applied to predict the ultimate strength. Moreover, a simple equation to predict the ultimate strength is derived using the product of the failure strain and elastic modulus.
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  • [title in Japanese]
    Kazuro KAGEYAMA
    1996 Volume 22 Issue 5 Pages 193-199
    Published: September 15, 1996
    Released on J-STAGE: August 11, 2009
    DOIhttps://doi.org/10.6089/jscm.22.193
    JOURNAL FREE ACCESS
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