Adhesion-cohesion balance of prepreg tack in thermoset automated fiber placement. Part 1: Adhesion and surface wetting

The constitution of prepreg tack in automated fiber placement (AFP) is affected by a sensitive balance between adhesive interfacial bond strength and cohesive strength of the prepreg resin. In an effort to explore the role of interfacial liquid-solid interaction on the tack of commercial aerospace-g...

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Autores principales:	D. Budelmann, C. Schmidt, D. Meiners
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Automated fiber placement Prepreg Carbon fiber Epoxy resin Adhesion Surface wetting Materials of engineering and construction. Mechanics of materials TA401-492
Acceso en línea:	https://doaj.org/article/3b5ad42444b34243a2f31b469ccd4050
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spelling	oai:doaj.org-article:3b5ad42444b34243a2f31b469ccd40502021-11-12T04:48:37ZAdhesion-cohesion balance of prepreg tack in thermoset automated fiber placement. Part 1: Adhesion and surface wetting2666-682010.1016/j.jcomc.2021.100204https://doaj.org/article/3b5ad42444b34243a2f31b469ccd40502021-10-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2666682021000979https://doaj.org/toc/2666-6820The constitution of prepreg tack in automated fiber placement (AFP) is affected by a sensitive balance between adhesive interfacial bond strength and cohesive strength of the prepreg resin. In an effort to explore the role of interfacial liquid-solid interaction on the tack of commercial aerospace-grade epoxy prepreg, a surface wetting analysis was performed on AFP-related substrates. The standard test liquid combination water/diiodmethane and extracted neat epoxy resin were used for contact angle measurement employing the sessile drop method and the Owens-Wendt-Rabel-Kaelble (OWRK) model. Additional rheological and topographical analyses were carried out to account for viscous resin flow on surfaces of different roughness. The results from the material characterization are discussed against the background of tack measurement by probe tack testing utilizing a rheometer. Significant differences between the investigated surfaces in terms of both the maximum tack level and the onset temperatures of adhesion were found as a function of test parameters relevant for contact formation. General agreement with the experimental tack results was observed employing a topographically extended version of the Dahlquist criterion. For each substrate, a temperature-dependent critical storage modulus could be determined that conforms to the onset temperature of tackiness. Contact angle measurements revealed a correlation between the thermodynamic work of adhesion and maximum tack and, moreover, the tack onset in the adhesive regime when additionally incorporating surface topography. Matching ratios of polar and dispersive surface free energy and surface tension components were found to favor the molecular interaction at the interface between prepreg resin and substrate.D. BudelmannC. SchmidtD. MeinersElsevierarticleAutomated fiber placementPrepregCarbon fiberEpoxy resinAdhesionSurface wettingMaterials of engineering and construction. Mechanics of materialsTA401-492ENComposites Part C: Open Access, Vol 6, Iss , Pp 100204- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Automated fiber placement Prepreg Carbon fiber Epoxy resin Adhesion Surface wetting Materials of engineering and construction. Mechanics of materials TA401-492
spellingShingle	Automated fiber placement Prepreg Carbon fiber Epoxy resin Adhesion Surface wetting Materials of engineering and construction. Mechanics of materials TA401-492 D. Budelmann C. Schmidt D. Meiners Adhesion-cohesion balance of prepreg tack in thermoset automated fiber placement. Part 1: Adhesion and surface wetting
description	The constitution of prepreg tack in automated fiber placement (AFP) is affected by a sensitive balance between adhesive interfacial bond strength and cohesive strength of the prepreg resin. In an effort to explore the role of interfacial liquid-solid interaction on the tack of commercial aerospace-grade epoxy prepreg, a surface wetting analysis was performed on AFP-related substrates. The standard test liquid combination water/diiodmethane and extracted neat epoxy resin were used for contact angle measurement employing the sessile drop method and the Owens-Wendt-Rabel-Kaelble (OWRK) model. Additional rheological and topographical analyses were carried out to account for viscous resin flow on surfaces of different roughness. The results from the material characterization are discussed against the background of tack measurement by probe tack testing utilizing a rheometer. Significant differences between the investigated surfaces in terms of both the maximum tack level and the onset temperatures of adhesion were found as a function of test parameters relevant for contact formation. General agreement with the experimental tack results was observed employing a topographically extended version of the Dahlquist criterion. For each substrate, a temperature-dependent critical storage modulus could be determined that conforms to the onset temperature of tackiness. Contact angle measurements revealed a correlation between the thermodynamic work of adhesion and maximum tack and, moreover, the tack onset in the adhesive regime when additionally incorporating surface topography. Matching ratios of polar and dispersive surface free energy and surface tension components were found to favor the molecular interaction at the interface between prepreg resin and substrate.
format	article
author	D. Budelmann C. Schmidt D. Meiners
author_facet	D. Budelmann C. Schmidt D. Meiners
author_sort	D. Budelmann
title	Adhesion-cohesion balance of prepreg tack in thermoset automated fiber placement. Part 1: Adhesion and surface wetting
title_short	Adhesion-cohesion balance of prepreg tack in thermoset automated fiber placement. Part 1: Adhesion and surface wetting
title_full	Adhesion-cohesion balance of prepreg tack in thermoset automated fiber placement. Part 1: Adhesion and surface wetting
title_fullStr	Adhesion-cohesion balance of prepreg tack in thermoset automated fiber placement. Part 1: Adhesion and surface wetting
title_full_unstemmed	Adhesion-cohesion balance of prepreg tack in thermoset automated fiber placement. Part 1: Adhesion and surface wetting
title_sort	adhesion-cohesion balance of prepreg tack in thermoset automated fiber placement. part 1: adhesion and surface wetting
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/3b5ad42444b34243a2f31b469ccd4050
work_keys_str_mv	AT dbudelmann adhesioncohesionbalanceofprepregtackinthermosetautomatedfiberplacementpart1adhesionandsurfacewetting AT cschmidt adhesioncohesionbalanceofprepregtackinthermosetautomatedfiberplacementpart1adhesionandsurfacewetting AT dmeiners adhesioncohesionbalanceofprepregtackinthermosetautomatedfiberplacementpart1adhesionandsurfacewetting
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Adhesion-cohesion balance of prepreg tack in thermoset automated fiber placement. Part 1: Adhesion and surface wetting

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