Effect of prepreg storage humidity on the mixed-mode fracture toughness of a co-cured composite joint |
| |
| Affiliation: | 1. Dental Biomaterials Research Chair, College of Applied Medical Sciences, King Saud University, Riyadh, Saudi Arabia;2. Dental Health Department, College of Applied Medical Sciences, King Saud University, Riyadh, Saudi Arabia;3. Department of Biomaterials Science, Institute of Dentistry, University of Turku, Turku, Finland;4. Stick Tech Ltd – Member of GC Group, Turku, Finland;5. Welfare Division, Turku, Finland;1. Univeristy of Surrey, Department of Mechanical Engineering Sciences, Faculity of Engineering and Physical Sciences, Guildford, GU2 7XH, UK;2. Bristol Composites Institute (ACCIS), Department of Aerospace Engineering, University of Bristol, Bristol, BS8 1TR, UK;1. Department of Chemical Engineering and Materials Science, University of Southern California, Los Angeles, CA, 90089-0241, USA;2. Department of Aerospace and Mechanical Engineering, University of Southern California, Los Angeles, CA, 90089-1453, USA;1. Depart. Electromechanical Engineering, University of Beira Interior, Covilhã, Portugal;2. ESTG/CDRsp, Polytechnic Institute of Leiria, Leiria, Portugal;3. CEMUC, Depart. Mechanical Engineering, University of Coimbra, Coimbra, Portugal |
| |
| Abstract: | The present work investigated the effect of the level of prepreg moisture content on the mixed-mode fracture toughness of a co-cured composite joint. It was found that moisture was stored in the prepreg as either free or bound water. It was also shown that the prepreg stores moisture from high humidity environments as free water, while the level of bound water remains unaffected. The excessive moisture was shown to plasticise the adhesive, lowering the glass transition temperature. The fracture toughness decreased under mode I and mode II loading as the humidity level was increased. There was a significant increase in mixed-mode toughness under low humidity conditions. Although the mixed-mode toughness reduced with increasing levels of humidity, the values never fell below that of the joints fabricated using the as-received materials. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
