New analytical model for delamination of CFRP during drilling
TypeArticles dans des revues avec comité de lecture
Drilling of composite material structure is a widely used process in aeronautical assembly due to its best manufacturing value (ratio quality/cost). However, delamination which can be generated at the hole exit is still a problem and is directly related to the drill axial force, the composite material mechanical characteristics and the load distribution along the cutting and chisel edges. This paper analyzes the distribution of the load along the drill edges and points out a triangular distribution associated to an additional load located at the centre of the drill. This additional load depends strongly on the feed rate. An orthotropic analytical model is then proposed in order to determine the delamination critical thrust during drilling for different combined loadings. This new model is compared with the existing ones in the literature and with experimental results. This analysis highlights that delamination occurs in a mixed mode and not in mode I only. The use of the B-K criterion for the determination of the equivalent critical energy release rate GC and a cutting edge combined loading (triangular distribution associated to an additional load) allow a close correlation between experimental measurements and the prediction of this new model.
Cette publication figure dans le(s) laboratoire(s) suivant(s)
Visualiser des documents liés par titre, auteur, créateur et sujet.
GIROT, Franck; DAU, Frédéric; GUTIERREZ-ORRANTIA, Esther (ELSEVIER, 2016)Drilling of composite material structure is a widely used process in aeronautical assembly due to itsbest manufacturing value (ratio quality/cost). However, delamination which can be generated at the holeexit is still a ...
TCHEIN, Gnofam Jacques; JACQUIN, Dimitri; ALDANONDO, Egoitz; COUPARD, Dominique; GUTIERREZ-ORRANTIA, Esther; GIROT MATA, Franck; LACOSTE, Eric (Elsevier BV, 2019)Hot deformation behavior of the Ti-6Al-4V alloy is studied through hot torsion tests. Cylindrical samples are twisted at different strain rates and temperatures in the β phase domain. The recorded torque vs twisting angle ...
RENDEROS, Mario; TORREGARAY, Amaia; GUTIERREZ-ORRANTIA, Esther; SAINTIER, Nicolas; GIROT, Franck (ELSEVIER, 2017)The possibility to reuse the metal powder wasted in Laser Material Deposition (LMD) process has been evaluated and a simple procedure developed. LMD uses metal powder which is fed through a nozzle into the focal point of ...
Mécanismes d'usure des outils coupants en usinage à sec de l'alliage de titane aéronautique Ti–6Al–4V NOUARI, Mohammed; CALAMAZ, Madalina; GIROT, Franck (Elsevier, 2008)In the present study, the titanium alloy ‘Ti–6Al–4V’ is orthogonally machined without cutting fluid. During experiments, the cemented carbide tools were rigidly mounted on the tool holder with rake angles of 0°, 15° and ...
CALAMAZ, Madalina; COUPARD, Dominique; GIROT, Franck (Trans Tech Publications, 2012)Improving the cutting processes by optimizing operating parameters necessarily involves understanding the thermo-mechanical mechanisms generated during chip formation. For this, numerical simulations are used to obtain ...