Path-dependent bond-line evolution in equilibrated core honeycomb sandwich structures
| Autor: | Daniel Zebrine, Mark Anders, Timotei Centea, Steven Nutt |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: | |
| Zdroj: | Advanced Manufacturing: Polymer & Composites Science, Vol 6, Iss 3, Pp 127-141 (2020) |
| Druh dokumentu: | article |
| ISSN: | 2055-0359 20550340 |
| DOI: | 10.1080/20550340.2020.1800194 |
| Popis: | During co-cure of honeycomb core sandwich panels, composite facesheets are cured and concurrently bonded to the core, introducing complex interactions that can lead to unsatisfactory bond-line formation. In this work, an in situ co-cure fixture is employed to directly observe the adhesive during processing and identify defect formation mechanisms specific to the bond-line. Relating fillet quality to imposed core pressure reveals the non-linear effect of core pressure. High pressures suppressed voids; intermediate pressures resulted in void growth and entrapment within deformed fillets; and low pressures led to void rupture and small, irregular fillets. Experimental results aided in developing a model to predict void growth in the bond-line. The findings presented here provide insight into the physics controlling the adhesive bond-line evolution during co-cure, which can inform manufacturing decisions to produce higher-quality honeycomb core sandwich structures. |
| Databáze: | Directory of Open Access Journals |
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