| Autor: |
Alan Baker, A.B. Harman, B. Whittingham, D. Bitton |
| Rok vydání: |
2009 |
| Předmět: |
|
| Zdroj: |
Composites Part A: Applied Science and Manufacturing. 40:1419-1432 |
| ISSN: |
1359-835X |
| DOI: |
10.1016/j.compositesa.2008.12.011 |
| Popis: |
The hard-patch approach to scarf repairs involves adhesively bonding a pre-formed patch into the scarf cavity. This approach has several potential advantages compared with the conventional soft-patch approach, which involves forming the patch from pre-preg and co-bonding it with the adhesive during cure of the patch directly in the repair cavity. Two methods for producing the hard-patch were investigated. The first was the moulded approach where the patch was laid up in a mould and cured prior to bonding in the repair cavity. The development and implementation of the moulded hard-patch repair technique on an F/A-18 horizontal stabiliser is described. The second approach involves machining the patch from a composite panel using digitised data obtained from the use of surface profiling equipment to capture the scarf cavity surface. Micrographic techniques were used to assess critical features of the bond-line produced from the different techniques. The results are compared with microscopic studies from a second F/A-18 horizontal stabiliser that was repaired much earlier using the soft-patch approach. Each repair is assessed in terms of the consolidation of plies along the bond-line and the conformity of the patch to the repair cavity as well as adhesive uniformity and porosity. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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Full Text from ScienceDirect