Void and porosity characterization of uncured and partially cured prepregs
| Autor: | Göran Fernlund, Leyla Farhang |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Void (astronomy)
Materials science Mechanical Engineering 02 engineering and technology Epoxy 021001 nanoscience & nanotechnology law.invention 020303 mechanical engineering & transports 0203 mechanical engineering Optical microscope Mechanics of Materials law visual_art Materials Chemistry Ceramics and Composites visual_art.visual_art_medium Composite material 0210 nano-technology Porosity |
| Zdroj: | Journal of Composite Materials. 50:937-948 |
| ISSN: | 1530-793X 0021-9983 |
| DOI: | 10.1177/0021998315583924 |
| Popis: | Void characterization and porosity measurements of uncured and partially cured carbon/epoxy prepregs are challenging due to the soft nature of the matrix. If samples need to be cut from a larger laminate, the act of cutting and polishing can alter the void morphology. This paper presents a method to prepare samples for optical microscopy by infiltrating the pore space in the soft prepreg with a room-temperature curing low-viscosity resin to support the structure during cutting and polishing in preparation for optical microscopy. The methodology is validated by comparison with results obtained from porosity measurements using the ASTM D2734 standard density method. The paper also explores the use of thickness measurements to determine porosity. It is shown that thickness measurements can be used to estimate porosity for the no-bleed out-of-autoclave prepreg system used in the present study but that the accuracy is lower than using microscopy or density methods. |
| Databáze: | OpenAIRE |
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