Effects of Seawater Immersion on the Impact Resistance of Glass Fiber Reinforced Epoxy Composites
| Autor: | Maurice F. Amateau, Mark L. Karasek, Larry H. Strait |
|---|---|
| Rok vydání: | 1992 |
| Předmět: |
Materials science
Mechanical Engineering Glass fiber Composite number Izod impact strength test 02 engineering and technology Epoxy Impact test 021001 nanoscience & nanotechnology Impact resistance 020303 mechanical engineering & transports 0203 mechanical engineering Mechanics of Materials visual_art Materials Chemistry Ceramics and Composites Immersion (virtual reality) visual_art.visual_art_medium Seawater Composite material 0210 nano-technology |
| Zdroj: | Journal of Composite Materials. 26:2118-2133 |
| ISSN: | 1530-793X 0021-9983 |
| Popis: | Little, if any, information regarding the effects of seawater immersion on the impact resistance of composite materials has been published to date. In the present study, instrumented impact tests were used to characterize such effects for two glass fiber reinforced epoxy composites. One material consisted of continuous nonwoven E-glass fibers in a conventional epoxy resin and the other consisted of woven E-glass fibers in a rubber toughened epoxy resin formulated specifically for marine applications. In the conventional epoxy system, the energy for incipient damage increased significantly follow ing seawater immersion due to plasticization of the matrix by the absorbed moisture. Both glass/epoxy systems experienced substantial reductions in peak load and energy absorbed at peak load as a result of moisture-induced degradation of the fibers and fiber/matrix interface. Energy after peak load decreased in the conventional epoxy system follow ing immersion. Total energy absorbed was reduced significantly for both glass/epoxy systems following seawater immersion. These results indicate that moisture-induced degradation can significantly reduce the impact resistance of glass fiber reinforced epoxy composites. |
| Databáze: | OpenAIRE |
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