巻号一覧
36 巻 (2010)
- 6 号 p. 222-
- 5 号 p. 179-
- 4 号 p. 129-
- 3 号 p. 94-
- 2 号 p. 33-
- 1 号 p. 4-
36 巻, 5 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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近藤 篤史, 佐藤 祐太, 末益 博志, 郷津 勝久, 青木 雄一郎2010 年 36 巻 5 号 p. 179-188
発行日: 2010年
公開日: 2011/08/25
ジャーナル フリーMixed mode II and III interlaminar fracture resistance of cross-ply carbon/epoxy composite laminates was experimentally and numerically evaluated using DNSCB (double notched split cantilever beam) test method, which enables a stable interface damage growth under the mixed-mode condition. Specimens with initial delaminations at two interfaces of 0° layers were used. The fracture morphology strongly depended on the mixed mode ratio. Complex damage comprising delaminations and inclined matrix cracks grew in the middle of the specimen where mode III component was dominant, while simple delaminations propagated outside the region of the complex damage where mode III component was comparatively small. Apparent dependence of the fracture toughness on the mixed-mode ratio was not found in the results obtained from the region of the simple delamination. The fracture resistance was considerably higher in complex damage region than in the region of simple delamination as expected from the significance of the damage state.抄録全体を表示PDF形式でダウンロード (2908K) -
守屋 一政, 井上 寛之, 加藤 勝義2010 年 36 巻 5 号 p. 189-197
発行日: 2010年
公開日: 2011/08/25
ジャーナル フリーThe adhesive layer in adhesive bonded joints can be seen as a dense assemblage of tiny adhesive bonding elements. Each element has low load transfer capacity, but its high density arrangement works smooth stress distribution, resulting in effective load transmission and high joint efficiency. In this paper, a type of mechanical joints between CFRP laminates and metal plates consisting of closely arranged ultra-thin pins is proposed. Each pin has only low shear strength, but its dense arrangement achieves high joint strength. Sharp-pointed, small-diameter pins can be pierced through B-staged CFRP laminate without cutting reinforcing fibers and inserted into pre-drilled holes in the metal plate to be joined. Since excess resin fills the gap between the pins and pin holes, the inserted pins are fixedly secured to the inner face of the hole, once the cocuring process is completed. A series of tensile shear tests of the proposed joint under both quasi-static and low-cycle fatigue loading conditions was carried out to investigate the possibility and feasibility of the present method. The tested joints showed both static and fatigue strength comparable to those of the base metal.抄録全体を表示PDF形式でダウンロード (3344K) -
黄木 景二, 山内 雅浩2010 年 36 巻 5 号 p. 198-204
発行日: 2010年
公開日: 2011/08/25
ジャーナル フリーA simple model for predicting tensile strength of a sheet molding compound (SMC) composite was proposed. The tensile strength associated with two failure modes, delamination and splitting, was derived based on fracture mechanics. The predicted strength was compared with experimental results. It was proved that the both failure modes provide the critical strength in the present SMC composite. The dependence of specimen width was explained by the theoretical strength for the splitting mode. In addition, it is suggested that smaller size of strands that determine the size of initial damages gives larger tensile strength.抄録全体を表示PDF形式でダウンロード (2561K)
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