巻号一覧
15 巻 (1989)
- 6 号 p. 235-
- 5 号 p. 185-
- 4 号 p. 137-
- 3 号 p. 89-
- 2 号 p. 49-
- 1 号 p. 1-
15 巻, 2 号
選択された号の論文の8件中1～8を表示しています
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瀬口 忠男1989 年 15 巻 2 号 p. 49-55
発行日: 1989/03/15
公開日: 2009/08/11
ジャーナル フリーPDF形式でダウンロード (2923K) -
飯阪 捷義1989 年 15 巻 2 号 p. 55-58
発行日: 1989/03/15
公開日: 2009/08/11
ジャーナル フリーPDF形式でダウンロード (2667K) -
田村 久明, 小合 佳正1989 年 15 巻 2 号 p. 58-60
発行日: 1989/03/15
公開日: 2009/08/11
ジャーナル フリーPDF形式でダウンロード (363K) -
「高剛性,無共振,軽量」の三条件阿部 保1989 年 15 巻 2 号 p. 60-63
発行日: 1989/03/15
公開日: 2009/08/11
ジャーナル フリーPDF形式でダウンロード (3428K) -
中西 洋一郎, 澤田 吉裕1989 年 15 巻 2 号 p. 64-70
発行日: 1989/03/15
公開日: 2009/08/11
ジャーナル フリーIn order to study the influence of surface properties of carbon fiber on the adhesive strength between the fiber and resin matrix, measurement of 90 degree tensile strength (FT) has been carried out on unidirectional carbon fiber-epoxy composites (CFRPs). Twelve types or PAN-based carbon fiber were used, namely, carbonized or graphitized, surface treated or untreated, and from two different manufacturers. FT of CFRPs were 12 to 52 MPa and they increased with increasing in ILSS and in interfacial shear strength. Fr was 1/3-2/3 of ILSS and twice the in-terfacial shear strength for CFRP of each fiber. It increased with increasing in the amount of acidic surface groups, concentration of surface oxygen and active surface area. In the case of carbonized fiber, the correlation curve between Fr and the concentration of surface oxygen was only one, and the relationship between Fr and the amount of acidic surface group was represented into two curves belonged to each manufacturer. But, the relationship of FT and the active surface area gived two straight line for fiber of each manufacturer, including graphitized fiber.抄録全体を表示PDF形式でダウンロード (863K) -
影山 和郎, 柳澤 昇1989 年 15 巻 2 号 p. 71-77
発行日: 1989/03/15
公開日: 2009/08/11
ジャーナル フリーEnd-notched flexure (ENF) test is commonly accepted to determine the mode II interlaminar fracture toughness of composite laminates. As the crack propagation in the ENF specimen is unstable under displacement-control, the critical energy release rate, GIIC, is determined at the onset of crack initiation but not during the crack propagation. In order to estimate the mode II fracture toughness from the initiation to the stable crack propagation, a new test method has been proposed in the present paper. A special COD gauge has been developed for the measurement of the crack opening displacement (COD) of ENF specimen and applied to the mode II interlaminar fracture toughness test. The crack initiation in the ENF specimen can be detected with higher accuracy from the load-COD diagram than the load-displacement dia-gram. Moreover, the crack propagates in the stable manner under the COD-control test, though it is unstable when the conventional displacement-control test is applied. Analytical compliance method has been successfully applied to the ENF test and the relation between fracture tough-ness, GIIC, and crack length, a, can be obtained automatically by using a computer aided test-ing system. Applicabilities of the COD-control test and the analytical compliance method to the ENF test are confirmed in the present paper.抄録全体を表示PDF形式でダウンロード (2808K) -
高橋 清久, 久山 徹也1989 年 15 巻 2 号 p. 78-84
発行日: 1989/03/15
公開日: 2009/08/11
ジャーナル フリーMechanical properties of fiber composites are dominated by the properties of fiber, matrix and the fiber/matrix interface. Especially the transverse and off-axis behaviors of unidirectional fiber composites are affected by the state of the interfacial adhesion. The effects of interfacial debonding (cavity formation) on the transverse elastic moduli of unidirectional fiber composites have been analyzed by Takahashi et al. In this paper, a mathematical model is developed to predict the intermediate state between the perfect adhesion and the cavity formation. It is assumed that the fiber and matrix can freely slip each other but they are not separated at the interface, i.e., the normal stress and displacement in the radial direction are continuous through the interface although the shear stress between the fiber and matrix vanishes. The expressions for the displacement and stress components are formulated using the theory of plane strain elasticity. Numerical examples are presented for a boron/aluminum composite subjected to the transverse uniaxial tension and the effects of the interfacial slippage on the transverse stress distribution are investigated analytically. The analytical model developed here constitutes the theoretical basis for the prediction of the initiation and growth of the in-terfacial crack and the accompanying stiffness degradation of the composite.抄録全体を表示PDF形式でダウンロード (787K) -
宗宮 詮1989 年 15 巻 2 号 p. 85-86
発行日: 1989/03/15
公開日: 2009/08/11
ジャーナル フリーPDF形式でダウンロード (318K)
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