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Descripción
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| This work shows the experimental procedures to develop a processing route for manufacturing of not fully cured composite parts able to be post-cured and consolidated with traditional fresh counterparts with the aim to produce one-shot integrated structures reducing cost and time. Semicured materials were manufactured from woven carbon dry fabrics and epoxy resin. The glass transition temperature Tg of the semicured article should lie between two limits. On one hand, the glass transition temperature should be high enough to maintain tackiness and deformability of the part within an acceptable range. On the other hand, the glass transition temperature should be low enough to provide the composite part with the adaptability necessary for the subsequent post-cure cycle. The temperature homogeneity of the mould was crucial to achieve the specific degrees of cure required for subsequent integration. To this end, the mould was equipped with number of independent heat resistances which allow a detailed control of the temperature of the composite part. The epoxy resin exothermal reaction was controlled and stopped according to the specific cure cycle. The cure cycle was determined after some trials and errors by measurement of the degree of cure from samples extracted from the semicured article using differential scanning calorimetry (DSC) and dynamic mechanical analysis (DMA). Following this procedure, it was possible to manufacture to final shape standard composite parts (e.g. stringer) with a targeted homogeneous degree of cure. The manufactured elements were then cold stored as standard prepregs prior to the subsequent integration with fresh and cured prepreg skins. Ensuring an adequate degree of cure, the composite part was able to adapt to skin thickness variations maintaining the geometry without resin bleeding from the semicured part. | |
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Internacional
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Si |
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Nombre congreso
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MATCOMP15 |
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Tipo de participación
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960 |
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Lugar del congreso
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Revisores
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Si |
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ISBN o ISSN
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0000-0000 |
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DOI
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Fecha inicio congreso
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20/05/2015 |
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Fecha fin congreso
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22/05/2015 |
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Desde la página
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1 |
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Hasta la página
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2 |
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Título de las actas
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Proceedings of MATCOMP15 |