巻号一覧
32 巻 (2006)
- 6 号 p. 231-
- 5 号 p. 193-
- 4 号 p. 147-
- 3 号 p. 99-
- 2 号 p. 49-
- 1 号 p. 1-
32 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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邊 吾一2006 年 32 巻 2 号 p. 49-50
発行日: 2006/03/15
公開日: 2009/08/11
ジャーナル フリーPDF形式でダウンロード (1326K) -
面外低速衝撃による積層複合材料の損傷進展シミュレーションの最新動向胡 寧2006 年 32 巻 2 号 p. 51-60
発行日: 2006/03/15
公開日: 2009/08/11
ジャーナル フリーPDF形式でダウンロード (7957K) -
黄木 景二, 井上 宏樹2006 年 32 巻 2 号 p. 61-66
発行日: 2006/03/15
公開日: 2009/08/11
ジャーナル フリーThis paper presents impedance response to alternating current in a CFRP unidirectional (UD) laminate. Firstly, impedance and its phase angle for frequency ranging from 1 kHz to 1 MHz were measured for the specimens with various off-axis angles. Secondly, change in impedance during tensile loading was measured for the above specimens. Finally, a simple model was proposed to express impedance properties of a UD laminate using an equivalent electric circuit. The norm of impedance is almost independent of frequency for all off-axis angles. The phase angle is kept to be constant for the off-axis angle below 45°while it becomes negative at high frequency for the off-axis angle larger than 60°. This behavior is expressed by an equivalent circuit model introducing a capacitance element. Impedance response to mechanical strain is almost linear for all the off-axis angles. Piezoresistance behavior at low strain was characterized on the basis of the above model.抄録全体を表示PDF形式でダウンロード (4471K) -
前場 豊, 胡 寧, 福永 久雄2006 年 32 巻 2 号 p. 67-75
発行日: 2006/03/15
公開日: 2009/08/11
ジャーナル フリーIn this paper, we propose a very useful and simple technique to stabilize the finite element simulations of delamination propagation in composite laminates when using cohesive interface model of comparatively coarse meshes. In this method, the move limit in the cohesive zone is built up to restrict the displacements of upper and lower layers of laminates. A forward Lagrange multiplier method, which is employed to enforce these constraint conditions, is realized in the explicit time integration scheme. The size of the move limit is theoretically discussed. Furthermore, a damping technique for avoiding the numerical instability put forward by other researchers is modified for the explicit time integration scheme and bi-linear cohesive model for composites. The characteristics of these two techniques are examined. Moreover, a DCB problem is employed to illustrate the validity of the present method.抄録全体を表示PDF形式でダウンロード (9152K) -
小田 奨, 高輪 武志2006 年 32 巻 2 号 p. 76-82
発行日: 2006/03/15
公開日: 2009/08/11
ジャーナル フリーIn this paper, vibration control is investigated for a smart carbon fiber reinforced plastics (CFRP) composite beam embedded by piezoceramics (PZT) and electro-rheological fluids (ERF) . A fuzzy model of the controlled element containing two actuators is formed because the application of linear control theory to the vibration control is very difficult due to the intensive nonlinearity in the ERF actuator. The time delay of the response of the actuators is also taken into consideration in this study. A controller for vibration suppression of the composite beam is designed based on the fuzzy model for guranteeing stability of the vibration control system. The effect of the control system is verified by experiment and simulation.抄録全体を表示PDF形式でダウンロード (3774K) -
繊維直径および内部欠陥の各母数への影響森本 哲也, 山本 耕士, 荻原 慎二2006 年 32 巻 2 号 p. 83-89
発行日: 2006/03/15
公開日: 2009/08/11
ジャーナル フリーTyranno ZMI Si-Zr-C-O fiber has been assessed if a set of parameters for single-modal Weibull model accurately scales the tensile strength of different diameter samples. Tyranno ZMI fiber has been known to have different diameters for both along the gauge length and between individual fibers within a bundle. Although Tyranno ZMI is an amorphous fiber, localized crystallization in a large diameter section may bias the strength from the Weibull scaling. In addition, large diameter sections may contain contaminant particles in different probability from small diameter sections and the particles probably disturb the spinning process. Thus, the parameters of single-modal Weibull model may vary as functions of fiber diameter. The strength estimation may be thus more reliable by correlating the factors of fiber diameter. What is more, key information for improving the reliability may be derived through coupling the Weibull strength scaling on different sets of fiber diameter samples and the fracture surface analyses. The authors thus assess in this study if the parameters of single-modal Weibull model vary with the sample diameters. The data of single fiber tensile tests had been divided into two groups, “small diameter” group and “large diameter group.” The Weibull parameters of the two groups showed inconsistency each other, and scanning electron microscope (SEM) analyses had revealed characteristic fractographs to one group. Thus, the authors have concluded that the parameters of single-modal Weibull model are dependent on the sample diameter on the strength scaling of Tyranno ZMI fiber.抄録全体を表示PDF形式でダウンロード (5726K) -
釜江 俊也, 田中 剛, 大背戸 浩樹2006 年 32 巻 2 号 p. 90-92
発行日: 2006/03/15
公開日: 2009/08/11
ジャーナル フリーPDF形式でダウンロード (2146K) -
原田 淳, 田中 茂樹, 平木 恵, 山口 栄勝, 石川 裕一2006 年 32 巻 2 号 p. 93-96
発行日: 2006/03/15
公開日: 2009/08/11
ジャーナル フリーPDF形式でダウンロード (2565K)
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