The Influence of GI and GII on the compression after impact strength of carbon fiber/epoxy laminates
| Autor: | Luke Scharber, Alan T. Nettles |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Toughness
Materials science Mechanical Engineering Izod impact strength test 02 engineering and technology Epoxy 021001 nanoscience & nanotechnology Compression (physics) 020303 mechanical engineering & transports 0203 mechanical engineering Mechanics of Materials visual_art Materials Chemistry Ceramics and Composites visual_art.visual_art_medium Composite material 0210 nano-technology |
| Zdroj: | Journal of Composite Materials. 52:991-1003 |
| ISSN: | 1530-793X 0021-9983 |
| Popis: | This study measured the compression after impact strength of IM7 carbon fiber laminates made from epoxy resins with various mode I and mode II toughness values to observe the effects of these toughness values on the resistance to damage formation and subsequent residual compression strength-carrying capabilities. A total of seven different epoxy resin systems were used ranging in approximate GI values of 245–665 J/m2 and approximate GII values of 840–2275 J/m2. The results for resistance to impact damage formation showed that there was a direct correlation between GII and the planar size of damage as measured by thermography. Subsequent residual compression strength testing suggested that GI had no influence on the measured values and most of the difference in compression strength was directly related to the size of damage. Thus, delamination growth assumed as an opening type of failure mechanism does not appear to be responsible for the loss of compression strength. |
| Databáze: | OpenAIRE |
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