Conclusions du chapitre

Suite à un premier chapitre à visée introductive et bibliographique, une étude plus axée sur une machine de tressage a été menée. Une analyse fonctionnelle du procédé de tressage, et de ses effets a été proposée. Cette étude a permis de mettre en évidence les paramètres influant sur la géométrie finale de la préforme, et ce en fonction de l’échelle considérée.

Les différents paramètres identifiés ont été listés. Pour essayer de quantifier les modifications qu’induiraient ces paramètres sur la tresse, une analyse géométrique théorique de la structure tresse dépendant de ces paramètres a été proposée. Les différents critères importants pour la différentiation des structures produites ont été mis en avant. L’importance de la maîtrise des paramètres du procédé vis-à-vis des résultats sur tresse produite s’avère comme étant primordiale. Un certain nombre de choix d’études a donc dû être fait. Dans la plupart des cas, pour chaque paramètre identifié, les mêmes hypothèses de modélisation ont été faites. Ces dernières permettent de proposer un modèle simple mais cependant exploitable dans la suite du manuscrit.

Une présentation de la dénomination et des échantillons produits a suivie. Ainsi, que les différents protocoles de caractérisation, qui serviront à obtenir des résultats expérimentaux à exploiter aux chapitres 3 et 4. Ces protocoles de caractérisation concernent aussi bien des caractéristiques géométriques que mécaniques ou thermiques, et permettent d’apporter un maximum d’informations lors du test de traction uniaxiale.

Dans le chapitre suivant seront détaillés les résultats géométriques expérimentaux obtenus. Une modélisation expérimentale dépendant des paramètres identifiés comme étant les plus influents sera proposée. Et cette modélisation sera comparée à une modélisation théorique qui découlera des observations effectuées dans ce chapitre.

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