Journal of the Japan Society for Composite Materials
Online ISSN : 1884-8559
Print ISSN : 0385-2563
ISSN-L : 0385-2563
Volume 2, Issue 3
Displaying 1-6 of 6 articles from this issue
  • [in Japanese]
    1976 Volume 2 Issue 3 Pages 99-107
    Published: July 31, 1976
    Released on J-STAGE: August 11, 2009
    JOURNAL FREE ACCESS
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  • [in Japanese]
    1976 Volume 2 Issue 3 Pages 107-113
    Published: July 31, 1976
    Released on J-STAGE: August 11, 2009
    JOURNAL FREE ACCESS
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  • T. FURUTA, Y. NOGUCHI, Y. SAKATANI, Y. YAMAGUCHI
    1976 Volume 2 Issue 3 Pages 114-118
    Published: July 31, 1976
    Released on J-STAGE: August 11, 2009
    JOURNAL FREE ACCESS
    Test results are presented on the static bending strength and the flexural fatigue strength of a honeycomb sandwich beam consisting of an aluminium honeycomb core and graphite fiber reinforced plastic facings. The static bending strength was measured by an Instron-type testing machine, Shimadzu AUTOGRAPH IS-20T, and the low cycle flexural fatigue strength was measured by the AUTOGRAPH IS-20T and an electro-hydraulic testing machine, Shimadzu SERVOPET Lab-5. In the flexural fatigue test under the bending stress “R=0.1”, a piece of rubber plate of 35 mm in length, 30 mm in width, and 3 mm in thickness was attached at each loading point on the CFRP aluminium honeycomb sandwich beams in order to prevent undesirable damages on the sandwich beams due to the concentrated loading. It was found that the static bending strength as well as the flexural fatigue strength of the honeycomb sandwich beams depends mainly on the properties of the facing materials. It was also found that the CFRP aluminium honeycomb sandwich has a sufficiently high strength in both static bending and flexural fatigue to be used as a structural component.
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  • Part I. Theoretical Basis
    K. WAKASHIMA
    1976 Volume 2 Issue 3 Pages 119-125
    Published: July 31, 1976
    Released on J-STAGE: August 11, 2009
    JOURNAL FREE ACCESS
    By applying Eshelby's theory on the ‘transformation’ and ‘inhomogeneity’ problems of an ellipsoidal inclusion, a macroscopic stress-strain relation is formulated for a composite material consisting of a matrix and a large number of aligned ellipsoidal inclusions. Some of the composites of practical interest, such as unidirectionally fiber-reinforced, particledispersion-strengthened, and layered composites, can be treated by changing the axial ratios of the ellipsoidal inclusions. The macroscopic stress-strain relation obtained is applicable to elastic, and elasto-plastic deformation of the composite in uniform loading.
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  • Part 1. Longitudinal Shear Loads
    T. ISHIKAWA, S. KOBAYASHI
    1976 Volume 2 Issue 3 Pages 126-132
    Published: July 31, 1976
    Released on J-STAGE: August 11, 2009
    JOURNAL FREE ACCESS
    The stress state in the unidirectional fiber-reinforced composites subjected to the longitudinal shear loading, τξz, is calculated with the point-matching technique. The square and the hexagonal array models are considered. The direction of the ξ-axis, in which τξz is defined, is arbitrarily taken in the transverse plane. The main results are that the maximum shear stress concentration is produced by τξz when the ξ-axis coincides with the direction in which the spacing between fibers is the thinnest and that it occurs at the fiber-matrix interface in any cases. It is also clarified that the maximum value of stress concentration factor is more dependent on geometrical parameters such as the closeness between fibers and the direction of the ξ-axis than on a material parameter, i. e., the shear moduli ratio of the constituents.
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  • 1976 Volume 2 Issue 3 Pages 133-134
    Published: July 31, 1976
    Released on J-STAGE: February 08, 2010
    JOURNAL FREE ACCESS
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