Mode I delamination behaviour of short fibre reinforced carbon fibre/epoxy composites following environmental conditioning |
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| Affiliation: | 1. Materials Science and Engineering Area, University Rey Juan Carlos, C/ Tulipán s/n, Móstoles, 28933 Madrid, Spain;2. Technological Support Center, University Rey Juan Carlos, C/ Tulipán s/n, Móstoles, 28933 Madrid, Spain;1. Chair of Food and Bioprocess Engineering School of Life Sciences Weihenstephan, Technical University of Munich, 85354, Freising, Germany;2. Faculty of Mechanical Engineering, Ingolstadt University of Applied Sciences, 85049, Ingolstadt, Germany;1. Institute of Macromolecular Chemistry v.v.i., Academy of Sciences of the Czech Republic, Heyrovskeho nam. 2, CZ-162 00 Praha, Czech Republic;2. Sorbonne Universités, UPMC Univ Paris 06, UMR 7574, Chimie de la Matière Condensée de Paris, F-75005 Paris, France;3. CNRS, UMR 7574, Chimie de la Matière Condensée de Paris, F-75005 Paris, France;4. Collège de France, UMR 7574, Chimie de la Matière Condensée de Paris, F-75005 Paris, France;1. Graduate School of Frontier Sciences, The University of Tokyo, 5-1-5, Kashiwanoha, Kashiwa-shi, Chiba 277-8561, Japan;2. Advanced Composites Technology Center, Japan Aerospace Exploration Agency (JAXA), 6-13-1, Osawa, Mitaka-shi, Tokyo 181-0015, Japan;3. Graduate School of Mechanical Engineering, Aoyama-Gakuin University, 5-10-1 Fuchinobe, Chuo-ku, Sagamihara-shi, Kanagawa 252-5258, Japan;4. Faculty of Engineering, Shizuoka University, 3-5-1, Johoku, Naka-ku, Hamamatsu-shi, Shizuoka 423-8561, Japan |
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| Abstract: | Carbon fibre laminates based on Newport Adhesives NCT-301 uniaxial pre preg were prepared for Mode I DCB testing. Polyamide and Polyolefin web materials supplied by Spunfab Ltd and Toyobos’ Zylon HM fibres were applied to the interlaminar region to enhance fracture toughness. Three of each specimen type were “treated”, subjected to immersion in 95 °C water for a period of 600 h. Two “untreated” control specimens of each type were aged at 21 °C and 40-95% relative humidity. Specimen weight gains in the order of 2% were found to occur in all immersed samples. Fracture toughness increases were evidenced in all treated samples with the exception of the Polyamide Web sample. Average GIc increases in treated samples were 250–300%. Untreated samples were found to have exclusively interlaminar crack propagation. Untreated samples containing Polyamide or Polyolefin Web reinforcement displayed increased fracture toughnesses. These toughness increases were attributed to improved interlaminar bonding. |
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