Path-dependent bond-line evolution in equilibrated core honeycomb sandwich structures

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 pro...

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Autores principales:	Daniel Zebrine, Mark Anders, Timotei Centea, Steven Nutt
Formato:	article
Lenguaje:	EN
Publicado:	Taylor & Francis Group 2020
Materias:	sandwich structures honeycomb core epoxy prepregs thermoset adhesives defect formation cure behaviors process monitoring autoclave processing Polymers and polymer manufacture TP1080-1185 Automation T59.5
Acceso en línea:	https://doaj.org/article/ca1b798069284f6c8df4e7ec4357ff5f
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id	oai:doaj.org-article:ca1b798069284f6c8df4e7ec4357ff5f
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spelling	oai:doaj.org-article:ca1b798069284f6c8df4e7ec4357ff5f2021-12-02T11:03:50ZPath-dependent bond-line evolution in equilibrated core honeycomb sandwich structures2055-035910.1080/20550340.2020.1800194https://doaj.org/article/ca1b798069284f6c8df4e7ec4357ff5f2020-08-01T00:00:00Zhttp://dx.doi.org/10.1080/20550340.2020.1800194https://doaj.org/toc/2055-0359During 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.Daniel ZebrineMark AndersTimotei CenteaSteven NuttTaylor & Francis Grouparticlesandwich structureshoneycomb coreepoxy prepregsthermoset adhesivesdefect formationcure behaviorsprocess monitoringautoclave processingPolymers and polymer manufactureTP1080-1185AutomationT59.5ENAdvanced Manufacturing: Polymer & Composites Science, Vol 6, Iss 3, Pp 127-141 (2020)
institution	DOAJ
collection	DOAJ
language	EN
topic	sandwich structures honeycomb core epoxy prepregs thermoset adhesives defect formation cure behaviors process monitoring autoclave processing Polymers and polymer manufacture TP1080-1185 Automation T59.5
spellingShingle	sandwich structures honeycomb core epoxy prepregs thermoset adhesives defect formation cure behaviors process monitoring autoclave processing Polymers and polymer manufacture TP1080-1185 Automation T59.5 Daniel Zebrine Mark Anders Timotei Centea Steven Nutt Path-dependent bond-line evolution in equilibrated core honeycomb sandwich structures
description	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.
format	article
author	Daniel Zebrine Mark Anders Timotei Centea Steven Nutt
author_facet	Daniel Zebrine Mark Anders Timotei Centea Steven Nutt
author_sort	Daniel Zebrine
title	Path-dependent bond-line evolution in equilibrated core honeycomb sandwich structures
title_short	Path-dependent bond-line evolution in equilibrated core honeycomb sandwich structures
title_full	Path-dependent bond-line evolution in equilibrated core honeycomb sandwich structures
title_fullStr	Path-dependent bond-line evolution in equilibrated core honeycomb sandwich structures
title_full_unstemmed	Path-dependent bond-line evolution in equilibrated core honeycomb sandwich structures
title_sort	path-dependent bond-line evolution in equilibrated core honeycomb sandwich structures
publisher	Taylor & Francis Group
publishDate	2020
url	https://doaj.org/article/ca1b798069284f6c8df4e7ec4357ff5f
work_keys_str_mv	AT danielzebrine pathdependentbondlineevolutioninequilibratedcorehoneycombsandwichstructures AT markanders pathdependentbondlineevolutioninequilibratedcorehoneycombsandwichstructures AT timoteicentea pathdependentbondlineevolutioninequilibratedcorehoneycombsandwichstructures AT stevennutt pathdependentbondlineevolutioninequilibratedcorehoneycombsandwichstructures
_version_	1718396316127592448

Path-dependent bond-line evolution in equilibrated core honeycomb sandwich structures

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