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A process model for the compaction and saturation of partially impregnated thermoset prepreg tapes

Identifieur interne : 000095 ( Main/Exploration ); précédent : 000094; suivant : 000096

A process model for the compaction and saturation of partially impregnated thermoset prepreg tapes

Auteurs : John J. Jr Gangloff [États-Unis] ; Pavel Simacek [États-Unis] ; Shatil Sinha [États-Unis] ; Suresh G. Advani [États-Unis]

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Mots-clés :

Abstract

Automated manufacturing of composite materials is key to reducing cost and improving consistency in part quality. Modeling of manufacturing processes can identify influential material, geometric, and process variables, while providing a framework for their optimization and control. A process model has been formulated to describe the compaction and saturation of partially impregnated thermoset prepreg tapes during their placement, using a roller compaction and vacuum consolidation. The roles of various parameters that characterize the initial prepreg tape state and the final prepreg tape state are investigated. The model yields the degree of resin saturation in the tape with changes in its thickness after being compacted, due to an external pressure. The results estimate the degree of dry fiber region within the tape, which can provide vacuum pathways for air or volatile removal before consolidation and cure. The model can be adapted for different material constitutive relationships of tape compaction and saturation.


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Le document en format XML

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<term>Curing (plastics)</term>
<term>Epoxy resin</term>
<term>Fiber reinforced material</term>
<term>Laminate</term>
<term>Manufacturing process</term>
<term>Mineral fiber</term>
<term>Modeling</term>
<term>Numerical simulation</term>
<term>Optimization</term>
<term>Porous medium flow</term>
<term>Prepreg</term>
<term>Theoretical study</term>
<term>Vacuum molding</term>
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<term>Stratifié</term>
<term>Préimprégné</term>
<term>Matériau composite</term>
<term>Modélisation</term>
<term>Procédé fabrication</term>
<term>Optimisation</term>
<term>Epoxyde résine</term>
<term>Matériau renforcé fibre</term>
<term>Fibre carbone</term>
<term>Moulage sous vide</term>
<term>Compactage</term>
<term>Automatisation</term>
<term>Durcissement (matière plastique)</term>
<term>Ecoulement milieu poreux</term>
<term>Simulation numérique</term>
<term>Etude théorique</term>
<term>Fibre minérale</term>
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<div type="abstract" xml:lang="en">Automated manufacturing of composite materials is key to reducing cost and improving consistency in part quality. Modeling of manufacturing processes can identify influential material, geometric, and process variables, while providing a framework for their optimization and control. A process model has been formulated to describe the compaction and saturation of partially impregnated thermoset prepreg tapes during their placement, using a roller compaction and vacuum consolidation. The roles of various parameters that characterize the initial prepreg tape state and the final prepreg tape state are investigated. The model yields the degree of resin saturation in the tape with changes in its thickness after being compacted, due to an external pressure. The results estimate the degree of dry fiber region within the tape, which can provide vacuum pathways for air or volatile removal before consolidation and cure. The model can be adapted for different material constitutive relationships of tape compaction and saturation.</div>
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