[article]
| Titre : |
Fabrication and testing of durable redundant and fluted-core joints for composite sandwich structures |
| Type de document : |
texte imprimé |
| Auteurs : |
S.-Y. Lin, Auteur ; S. C. Splinter, Auteur ; C. Tarkenton, Auteur ; D. A. Paddock, Auteur ; S. S. Smeltzer, Auteur ; S. Ghose, Auteur ; J. C. Guzman, Auteur ; D. A. McCarville, Auteur ; D. J. Sutkus, Auteur |
| Année de publication : |
2013 |
| Article en page(s) : |
p. 30-39 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Analyse des défaillances (fiabilité)
Assemblages (technologie)
Construction sandwich -- Propriétés mécaniques
Contraintes (mécanique)
Essais dynamiques
Industries aérospatiales -- Matériaux
Polytétrafluoréthylène
Structure en nid d'abeilles
Traction (mécanique)
|
| Index. décimale : |
620.19 Autres matériaux |
| Résumé : |
The development of durable bonded joint technology for assembling composite structures is an essential component of future space technologies. White NASA is working toward providing an entirely new capability for human space exploration beyond low Earth orbit, the objective of this project is to design, fabricate, analyze, and test a NASA patented durable redundant joint (DRJ) and a NASA/Boeing co-designed fluted-core joint (FCJ). The potential applications include a wide range of sandwich structures for NASA's future launch vehicles.
Three types of joints were studied — splice joint (SJ, as baseline), DRJ, and FCJ. Tests included tension, after-impact tension, and compression. Teflon strips were used at the joint area to increase failure strength by shifting stress concentration to a less sensitive area. Test results were compared to those of pristine coupons fabricated utilizing the same methods. Tensile test results indicated that the DRJ design was stiffer, stronger, and more impact resistant than other designs. The drawbacks of the DRJ de¬sign were extra mass and complex fabrication processes. The FCJ was lighter thon the DRJ but less impact resistant. With barely visible but detectable impact damages, all three joints showed no sign of tensile strength reduction. No compression test was conducted on any impact-damaged sample due to limited scope and resource. Failure modes and damage propagation were also studied to support progressive damage modeling of the Si and the DRJ. |
| Note de contenu : |
- DESIGN AND FABRICATION : Design features - Durable redundant joint (DRJ) - Fluted-Core joint (FCJ) - Fabrication
- EXPERIMENTATION
- RESULTS : SJ tensile test - DRJ tension test - Tension test with impact damage - SJ and DRJ compression test - Fluted-core compression test |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18941 |
in SAMPE JOURNAL > Vol. 49, N° 4 (07-08/2013) . - p. 30-39
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