In-situ analysis of cocured scarf patch repairs
| Autor: | David B. Bender, Timotei Centea, Steven Nutt |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | Advanced Manufacturing: Polymer & Composites Science, Vol 8, Iss 3, Pp 134-143 (2022) |
| Druh dokumentu: | article |
| ISSN: | 20550340 2055-0359 2055-0340 |
| DOI: | 10.1080/20550340.2022.2106347 |
| Popis: | To address the need for high-quality in-field repair of composite structures, a vacuum-bag-only (VBO) prepreg was designed, produced, and evaluated. The prepreg featured semi-preg formatting and a room-temperature-stable resin. The format provided a multitude of pathways with much shorter breathe-out distances relative to conventional, edge-breathing VBO prepregs, and thus enhanced through-thickness air permeability. A custom-built scarfed repair tool with an in-situ observation window was designed and employed to analyze the cure process during a repair. Microstructural quality, interlaminar shear strength, and glass transition temperature of semi-preg panels were compared to wet-laid epoxy panels processed with double vacuum debulking (DVD). The semi-preg formatting effectively reduced porosity for in-field scarf panels, and when used with the new material system, presents a viable alternative to DVD and wet layup. |
| Databáze: | Directory of Open Access Journals |
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