巻号一覧
23 巻 (1997)
- 6 号 p. 199-
- 5 号 p. 161-
- 4 号 p. 121-
- 3 号 p. 81-
- 2 号 p. 41-
- 1 号 p. 1-
23 巻, 4 号
選択された号の論文の4件中1～4を表示しています
- |<
- <
- 1
- >
- >|
-
山口 宗明, 田中 裕子, 田中 勝敏1997 年 23 巻 4 号 p. 121-128
発行日: 1997/07/15
公開日: 2009/08/11
ジャーナル フリーThe composite materials were made from three multi-functional epoxy resins (EP) cured with five hardeners and filled with aramid (Technora®) short fibers (AFP) by 2.44 wt%. Effects of aging (heat-treated) at 130°C for 5, 000 h and wetting at 21°C for 5, 000 h in distilled water on the dynamic mechanical properties were studied. The morphology of the fiber dispersion in AFP-filled specimens did not change during the aging. Weight of the aged specimens decreased for a prolonged aging time. The maximum decrease during the aging for 5, 000h was 3.5wt%. The glass transition temperature (Tg) of all the specimens shifted to higher temperature by the aging. The dynamic storage moduli (E') of most of aged specimens decreased at lower temperature (-140°C) and room temperature (25°C) compared with those of unaged specimens. At higher temperature (200°C), the moduli of specimens almost increased and in particularly those of the specimens cured with diamines increased significantly. Absorbed water of wet specimens reached a maximum value of 5.0wt%, and values of the specimens cured with diamines were larger than those of the specimens cured with acid anhydrides. The Tgof all the specimens shifted to lower temperature by the absorption of water. E' of many wet specimens increased in the range of lower temperature to room temperature, but E' of all the specimens at higher temperature extremely fell down.抄録全体を表示PDF形式でダウンロード (3829K) -
李 正旺, 金原 勲, 影山 和郎, 鈴木 敏夫, 大沢 勇1997 年 23 巻 4 号 p. 129-136
発行日: 1997/07/15
公開日: 2009/08/11
ジャーナル フリーMode II fatigue delamination growth behaviors of toughened unidirectional CF/Epoxy laminates, T800H/3900-2 and IM-600/#134, were characterized. Both GIImax-constant tests and GIImax-shedding tests were conducted by a test system based on CSD measurement. As the results, in the initial period of the delamination growth there exist transient behaviors of the delamination growth rate. The index number of power law of two kinds of toughened CFRP were smaller than that of the untoughened CFRP, T800H/3631. But for the threshold behavior, there was almost no improvement with the toughening. The difference of the mode II delamination behaviors between the toughened CFRP and the untoughened CFRP is related to the thickness of their interlamination and the size of the plastic zone. Moreover, the influence of stress ratio was evaluated by applying equivalent energy release rate range. Discussion are also made on the delamination growth onset determination.抄録全体を表示PDF形式でダウンロード (9838K) -
隋 広軍, 大好 直, 三浦 公久, 渋谷 嗣1997 年 23 巻 4 号 p. 137-143
発行日: 1997/07/15
公開日: 2009/08/11
ジャーナル フリーDiscussion of elastic wave backscatter from an inhomogeneous layered part of a composite is made with the computational results by using a special layer elements. The stacking of linear inhomogeneous layer element, say LILE, has been certified as an excellent model for the computation of a gradient inhomogeneous layer. Intensity curves of the backscatter calculated as a function of incident wave number are presented in a wide frequency range, and characteristic relations between the inhomogeneous structure and the backscatter intensity are discussed. The results show that some peaks appear on the curves. Study of the characteristic features provides us viable clues for computation to get the information on layering structure and spatial exponential decay of inhomogeneous material constants of composites.抄録全体を表示PDF形式でダウンロード (901K) -
第10章 複合材料の強度則座古 勝, 倉敷 哲生1997 年 23 巻 4 号 p. 144-150
発行日: 1997/07/15
公開日: 2009/08/11
ジャーナル フリーPDF形式でダウンロード (2112K)
- |<
- <
- 1
- >
- >|