ArFRPの引張と疲労における層間はく離進展特性に及ぼす水環境効果
スポンサーリンク
概要
- 論文の詳細を見る
An investigation has been carried out concerning the influences of water absorption on the tensile and fatigue properties of two kinds of (0°/±45°/90°)_<2s> aramid fiber/epoxy composites, I. E., Kevlar 49 and HM50 composites. The delamination growth behavior was quantitatively evaluated with a scanning acoustic micrscope. The specimens used were dry and wet ones, which were respectively preconditioned in air and in water at 80℃ for two months. Under a static tensile loading, for both wet and dry specimens, resin cracking and interfacial debonding in the weakest 90°ply were followed by the lowering of load carrying capacity of 90°and 45° plies, and the final fracture was caused through an increase in 0°ply stress. Resin cracking in wet specimens was observed at a lower stress level than in dry ones, because water absorption lowered the interfacial strength between fiber and matrix, I. E.,lowering of the interlaminar strength of laminates. Under a fatigue loading, compliance changes were divided into three regions, I. E., Region I, II and II'. In the cases of dry specimens in air and wet specimens in air, compliance was kept constant in Region I and was increased in Region II. In the case of wet specimens in water, however, Region I was diminished and Region II started from the beginning of the fatigue test owing to the water absorption through the 90° ply cracking. The influence of water absorption on delamination growth behavior was also discussed based upon the observation of ply-to-ply delamination with a scanning acoustic microscope.
- 社団法人日本材料学会の論文
- 1993-04-15
著者
関連論文
- 人工海水中における高張力綱溶接材の腐食疲労き裂進展特性
- 人工海水中における 50kgf/mm^2 級 TMCP 鋼の腐食疲労き裂進展特性
- 人工海水中における高張力鋼の非貫通表面疲労き裂進展特性
- 409 人工海水中における 50 キロ級 TMCP 鋼の腐食疲労き裂進展特性(海洋構造物材の腐食疲労特性, 海洋構造物の安全性と設計, 加工・システム・利用技術, 日本鉄鋼協会第 112 回(秋季)講演大会)
- 実働荷重下における腐食疲労き裂の進展
- 実働荷重かにおけるき裂進展とふん囲気の影響
- 環境助長割れ診断エキスパートシステムの開発と診断知識の重要度評価
- OPS 83を用いたステンレス鋼の SCC 診断エキスパートシステムの試作
- 113 OPS83を用いた応力腐食割れ診断エキスパートシステムの試作(統計的取扱いと知識工学)
- 5.4 材料のミクロ観察とマイクロマテリアル研究の現状(5.材料力学)