巻号一覧
17 巻 (1991)
- 6 号 p. 223-
- 5 号 p. 179-
- 4 号 p. 133-
- 3 号 p. 89-
- 2 号 p. 45-
- 1 号 p. 1-
17 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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平野 徹, 若島 健司1991 年 17 巻 2 号 p. 45-52
発行日: 1991/03/15
公開日: 2009/08/11
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原川 正司, 安部 康明1991 年 17 巻 2 号 p. 52-57
発行日: 1991/03/15
公開日: 2009/08/11
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福田 武人, 逢坂 勝彦, 谷口 誠1991 年 17 巻 2 号 p. 58-65
発行日: 1991/03/15
公開日: 2009/08/11
ジャーナル フリーIn the present study, the mechanical property degradation due to fatigue damage in glassfiber reinforced plastics (GFRP) has been evaluated by acoustic emission (AR) techniques. Degradation of strength and stiffness of GFRP laminates subjected to cyclic bending loads was evaluated by measurement of the AE behaviors under the static bending loads. In the ex-periments, three levels of amplitude of applied stress and two kinds of load cycles whose ratios to the fatigue life were 0.6 and 0.8 were adopted for giving the specimens fatigue damage. Under six kinds of cyclic loading conditions the relationship between the AR parameters and the degradation of strength and stiffness was obtained. From the results the followings were made clear. The total AE ringdown counts increased with the degradation of strength and stiffness. The relationship between the total AE ringdown counts and the residual strength suggested that the fatigue damage could be different in spite of the same residual strength. Many AR event counts above 80 dB in amplitude were observed in specimens subjected to the cyclic loadings. The ratio of the AE event counts above 80 dB amplitude to the total AR event counts well indicated the degradation of strength and stiffness due to fatigue damage.抄録全体を表示PDF形式でダウンロード (2591K) -
増田 千利, 田中 義久, 山本 元弘, 深沢 稔1991 年 17 巻 2 号 p. 66-73
発行日: 1991/03/15
公開日: 2009/08/11
ジャーナル フリーEffect of the volume fraction on the fatigue strength was studied for three commercially fabricated aluminum matrix composites containing SiC whiskers (SiCw) and SiC particles (SiCp). The fatigue strength of SiCw/A2024 composite increased with the increase of the volume fraction of SiC whiskers, while the fatigue strength of SiCp/A356 composite showed maximum at a volume fraction of 10%. The fractography revealed that the fatigue crack would initiate at many voids situated near the specimen surface (fish eye failure) for 20%-SiCp/A356. It is suggested that the fatigue strength decreases due to the fish eye failure for 20%-SiCp/A356 composite. It is pointed out that the fish eye failure would prevent to improve the fatigue strength for SiC particulate reinforced aluminum composites.抄録全体を表示PDF形式でダウンロード (4515K) -
粕谷 平和1991 年 17 巻 2 号 p. 74-79
発行日: 1991/03/15
公開日: 2009/08/11
ジャーナル フリーIn general, laminated composite cylindrical shells exhibit the effect of lamination constitution due to the anisotropy and the unsymmetry of lamination. In the present paper, the buckling problems of carbon fiber/epoxy (CFRP) cross-ply and angle-ply laminated cylindrical shells under torsion are considered. That is, the effects of stacking sequence, number of layers, lamination angle, buckling modes and dimension of cylinders, on the buckling stresses are analysed by use of the equilibrium equation based on the Donnell-type expressions.抄録全体を表示PDF形式でダウンロード (539K) -
藤田 和宏, 澤田 吉裕, 本城 国明1991 年 17 巻 2 号 p. 80-84
発行日: 1991/03/15
公開日: 2009/08/11
ジャーナル フリーVarious barrier coatings were deposited on PAN-based high strength type carbon fibers from vapor phase. The coatings were carbon layer (C) or various double layers consisting of a carbon under-layer and a ceramic over layer (denoted by C/TiC, C/TiN, C/SiC). After Ti-B m, ixture was coated on the fibers, molten aluminum alloy was infiltrated to prepare CFRAI wire. These wires were heated at 500°C for 3 days in a vacuum. Tensile strength of the wire, tensile strength of the filament in the wire, filament pull-out length at tensile fracture surface and the amount of formed aluminum carbide were measured. Among these coatings, C and C/TiC had low effect as a reaction barrier between fiber and aluminum, while the interfacial bonding strength between the coated carbon fiber and aluminum increased by the heat treatment. Though C/SiC and C/TiN had high effect to reduce the reaction, the interfacial bonding strength decreased by the heat treatment. Totally judging, C/SiC was the best among these barrier coatings.抄録全体を表示PDF形式でダウンロード (634K) -
町田 輝史1991 年 17 巻 2 号 p. 87
発行日: 1991/03/15
公開日: 2009/08/11
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今井 義雄1991 年 17 巻 2 号 p. 87a
発行日: 1991/03/15
公開日: 2009/08/11
ジャーナル フリーPDF形式でダウンロード (155K)
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