Étude du perçage à sec de l'empilage Ti6Al4V/Composite fibre de carbone

Abstract : The aeronautic field has stronger and stronger requirements so the use of materials for structures has been unavoidable. That’s why carbon fiber composite is appeared in plane structures, used with elements in titanium alloy, and most part of them in Ti6Al4V. These materials are also dispatched in stacks and are drilled in a “one shot” operation, in the aim of being assembled with rivets or bolts. Through the industrial point of view, many problems are highlighted by this operation, generating several over costs. Technologic and scientific locks linked with this operation will be analyzed in this study.The knowledge of local stresses exerted by the tool on the machined matter is the first point allowing the improvement of the understanding of phenomenon that occurs during cutting. Few processes will be experimented to determine stresses submitted by the tool during drilling with accuracy. In the aim of completing the knowledge of the cutting operation, the analysis of the temperature inside the drill is needed. That’s why different experimental devices of thermal measurement are developed.These devices have allowed instrumented machining of holes in each material separately and in the stack of Ti6Al4V/CFRP in order to understanding phenomenon that occur during this operations.
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Antoine Poutord. Étude du perçage à sec de l'empilage Ti6Al4V/Composite fibre de carbone. Génie mécanique [physics.class-ph]. Ecole nationale supérieure d'arts et métiers - ENSAM, 2014. Français. ⟨NNT : 2014ENAM0149⟩. ⟨tel-01148708⟩

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