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Manufacture of thin composite structures by the RTM process : Numerical simulation of the shaping operation

Identifieur interne : 005655 ( Main/Exploration ); précédent : 005654; suivant : 005656

Manufacture of thin composite structures by the RTM process : Numerical simulation of the shaping operation

Auteurs : J. C. Gelin [France] ; A. Cherouat [France] ; P. Boisse [France] ; H. Sabhi [France]

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Mots-clés :

Abstract

The glass-fibre preform shaping process is the first stage of the RTM manufacturing process for the production of thin fabric-reinforced composite structures. A numerical tool for the simulation of this shaping process is proposed. The aim of the software developed is to be able to determine if a drawing operation is possible before the manufacturing of expensive tools. The approach used is a mechanical one. The behaviour of the flat fabrics used in the shaping process is obtained from the tensile curve of a single yarn and the current position of yarns during the shaping operation. Discrete finite elements made of yarns are used, which lead to a good numerical efficiency, especially in the case of elements directed by the yarns. A set of comparisons between shaping simulations and experimental results proves the validity of the proposed formulation.


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Le document en format XML

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<div type="abstract" xml:lang="en">The glass-fibre preform shaping process is the first stage of the RTM manufacturing process for the production of thin fabric-reinforced composite structures. A numerical tool for the simulation of this shaping process is proposed. The aim of the software developed is to be able to determine if a drawing operation is possible before the manufacturing of expensive tools. The approach used is a mechanical one. The behaviour of the flat fabrics used in the shaping process is obtained from the tensile curve of a single yarn and the current position of yarns during the shaping operation. Discrete finite elements made of yarns are used, which lead to a good numerical efficiency, especially in the case of elements directed by the yarns. A set of comparisons between shaping simulations and experimental results proves the validity of the proposed formulation.</div>
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