巻号一覧
36 巻 (2010)
- 6 号 p. 222-
- 5 号 p. 179-
- 4 号 p. 129-
- 3 号 p. 94-
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36 巻, 6 号
選択された号の論文の3件中1～3を表示しています
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研究論文
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亀山 正樹, 宮本 裕二, 福永 久雄2010 年 36 巻 6 号 p. 222-229
発行日: 2010年
公開日: 2011/08/25
ジャーナル フリーThe present paper treats the single modal vibration control of CFRP laminated plates based on the independent modal space control. A modal sensor for identifying specific vibration mode is constructed by one accelerometer and one band-pass filter, where the sensor is optimally placed based on the minimization criterion of observation spillover due to unmeasured vibration modes. Moreover, one macro-fiber composite (MFC) actuator is also optimally placed to maximize the induced modal control force for controlled vibration mode. The effectiveness of optimal placement of MFC actuator for vibration suppression is examined through the experimental results.抄録全体を表示PDF形式でダウンロード (1471K) -
野村 学, 菅野 進, 山尾 忍2010 年 36 巻 6 号 p. 230-236
発行日: 2010年
公開日: 2011/08/25
ジャーナル フリーGlass-fiber (GF) is good reinforcement because of its large aspect-ratio. GF reinforced thermoplastics (GFRTP) have high mechanical properties, but shortages as that a warp easily occur because of different shrinkage of MD (mold flow direction) and TD (tangential direction of flow). In this study, the effect of new GF having some flat shape of cross section on properties of GFRTP was examined. The modified GF indicated good shrinkage ratio of TD to MD, and restrained the warp of GFRTP. In normal GF, flexural strength and IZOD impact strength of TD went down compared with MD. But for the flat GF, the high reinforcement in TD was indicated same as in MD. Besides the modified GF accompanied with melt polymer at lower share rate in comparison with normal GF and so it indicated good fluidity in mold. The result suggests that the importance of control of fiber shape is same as that of length.抄録全体を表示PDF形式でダウンロード (1882K) -
星 光, 中野 啓介, 岩堀 豊, 石川 隆司, 矢島 浩, 福田 博2010 年 36 巻 6 号 p. 237-245
発行日: 2010年
公開日: 2011/08/25
ジャーナル フリーAn experimental investigation on the mechanical properties of CFRP scarf joints with impact damage was carried out to understand the relationship between scarf angle and impact characteristics. This research shows the effect of the scarf angle on various characteristics, tensile strength, impact damage, and tensile after impact (TAI) strength. These characteristics were investigated experimentally about four scarf angles of 2º, 3º, 4.5º, and 6º. For the non-damaged specimen tensile test, it was found that the tensile strength decreases as the scarf angles increase. It was thought that the reason of decreasing of tensile strength was decrease of bonded area of scarf joint due to increase of scarf angle. Tensile fracture mode of non-damaged specimens were changed from net tension failure mode to adhesive failure mode as the scarf angles increase. As a result of the cross-sectional observation after impact test, impact damage area was increased by the increasing of scarf angle. At the higher scarf angle, debonding of adhesive layer was increased, but damage of laminate was decreased. It was thought that the damage decreasing of laminate was affected by the energy absorption due to significant debonding in the adhesive layer. For the damaged specimen tensile test, residual tensile strength decreased as the scarf angles increase. It was thought that the residual tensile strength of the scarf joints was affected by the increase of debonding in the adhesive layer at higher scarf angle.抄録全体を表示PDF形式でダウンロード (3559K)
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