日本複合材料学会誌

GFRPの成形法の現状と展望

百島祐忠

1976 年 2 巻 3 号 p. 99-107
発行日: 1976/07/31
公開日: 2009/08/11

DOIhttps://doi.org/10.6089/jscm.2.99

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固体の付着と表面自由エネルギー

堤和男

1976 年 2 巻 3 号 p. 107-113
発行日: 1976/07/31
公開日: 2009/08/11

DOIhttps://doi.org/10.6089/jscm.2.107

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CFRPアルミハニカムサンドイッチ材の強度と曲げ疲労強度

古田敏康, 野口義男, 酒谷芳秋, 山口泰弘

1976 年 2 巻 3 号 p. 114-118
発行日: 1976/07/31
公開日: 2009/08/11

DOIhttps://doi.org/10.6089/jscm.2.114

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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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複合材料の巨視的力学特性

第I報理論的基礎

若島健司

1976 年 2 巻 3 号 p. 119-125
発行日: 1976/07/31
公開日: 2009/08/11

DOIhttps://doi.org/10.6089/jscm.2.119

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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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一方向繊維強化複合材料の応力解析

第1報繊維に沿うせん断荷重

石川隆司, 小林繁夫

1976 年 2 巻 3 号 p. 126-132
発行日: 1976/07/31
公開日: 2009/08/11

DOIhttps://doi.org/10.6089/jscm.2.126

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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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文献紹介

1976 年 2 巻 3 号 p. 133-134
発行日: 1976/07/31
公開日: 2010/02/08

DOIhttps://doi.org/10.6089/jscm.2.133

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