CFRP drilling: Fundamental study of local feed force and consequences on hole exit damage. |
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| Affiliation: | 1. Arts et Metiers ParisTech, LaBoMaP, rue Porte de Paris, 71250 Cluny, France;2. Université de Lyon, ENISE, LTDS, CNRS UMR5513, 58 rue Jean Parot, 42000 Saint-Etienne, France;3. EADS IW, 12 bis, rue Pasteur, 92152 Suresnes Cedex, France;1. Jiangsu Key Laboratory and Micro-Manufacturing Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;2. Beijing Xinghang Mechanical and Electrical Equipment Co., Ltd., Beijing 100000, China;1. State Key Laboratory of Tribology, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China;2. Beijing Key Lab of Precision/Ultra-precision Manufacturing Equipments and Control, Beijing, 100084, China;3. Division of Advanced Manufacturing, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China;4. Beijing Xinghang Mechanical-Electrical Equipment Co., Ltd, Beijing, 100074, China;1. Lebanese University, Faculty of Engineering, Mechanical Engineering Department, P.O. Box: 27622319, Roumieh, Lebanon;2. Université de Toulouse, INSA, UPS, Mines Albi, ISAE, ICA (Institut Clément Ader), Bât 3R1, 118 Route de Narbonne, F-31062 Toulouse cedex 9, France;1. Lebanese University, Faculty of Engineering, Mechanical Engineering Department, P.O. Box: 27622319, Roumieh, Lebanon;2. Université de Toulouse, INSA, UPS, Mines Albi, ISAE, ICA (Institut Clément Ader), Bât 3R1, 118 Route de Narbonne, F-31062 Toulouse cedex 9, France;1. MSMP Laboratoire, Arts et Métiers ParisTech, Rue Saint Dominique BP508, Châlons-en-Champagne 51006, France;2. School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, PR China;1. Aalen University of Applied Sciences, Materials Research Institute, Aalen, Germany;2. Ulm University of Applied Sciences, Institute of Production Engineering and Materials Testing, Ulm, Germany |
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| Abstract: | Carbon Fiber-Reinforced by Plastic (CFRP) is now commonly used in the aircraft industry. The main challenge is to manufacture this difficult-to-cut work material, considering its quality criteria and economical aspects. Drilling is the main machining operation required for the assembly of the aircraft structure. In this paper, results are presented and discussed regarding exit delamination studied at a local scale. Because of the anisotropic properties of CFRP, the fiber cutting modes change with the composite sequence combined with the drill revolution parameters. The local feed forces generated by the cutting edge on the hole bottom may be correlated with delaminating aspects. A posttreatment method is proposed to analyze precisely these feed force and cutting torque distributions. Appropriate ply sequences are identified in order to limit the mechanical load concentration and the risk of delamination or uncut fibers |
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| Keywords: | Drilling Carbon fibers Delamination Modeling Structural composites |
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