Experimental investigation of drilling damage and stitching effects on the mechanical behavior of carbon/epoxy composites |
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| Affiliation: | 1. Laboratory of Innovative Technology, IUT of Amiens, GMP Department, University of Picardie Jules Verne, Avenue des Facultés Le Bailly, 80001 Amiens Cedex 1, France;2. University of Technology of Compiègne, Laboratory Roberval UMR CNRS 7337, BP 20529, Rue Personne de Roberval, 60206 Compiègne Cedex, France;1. Odessa National Polytechnic University, Shevchenko Avenue 1, 65044 Odessa, Ukraine;2. Politecnico di Torino, Department of Management and Production Engineering, Corso Duca degli Abruzzi 24, 10129 Torino, Italy;1. Department of Mechanical Engineering, University of Sheffield, Sir Frederik Mappin, Mappin St, Sheffield S1 3JD, UK;3. School of Mechanical Engineering, Jiangsu University, Zhenjiang, China;1. College of Mechanical and Electrical Engineering, Hunan University of Science and Technology, Xiangtan 411201, China;2. Hunan Provincial Key Laboratory of Health Maintenance for Mechanical Equipment, Hunan University of Science and Technology, Xiangtan 411201, China;3. School of Mechanical Engineering, Yeungnam University, 214-1 Daedong, Gyoungsan, Kyoungbuk 712-749, South Korea;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 |
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| Abstract: | The main purpose of composite materials drilling is the need to put together different parts of a structure, in aeronautics for example. Machining generates damages which affect mechanical properties and have to be taken into account during manufacturing process. The objective of this study is to experimentally analyze the influence of drilling on a carbon/epoxy composite, to investigate the relationships among damages, cutting forces, mechanical properties of the drilled specimens and crack propagation. Stitching and a range of spindle speed and feed have been tested when drilling with a classic twist drill. The effect of each parameter has been assessed in terms of thrust force, moment (during machining) and defects, and then linked to mechanical test results. Experimental results have shown significant influences of feed and composite configuration on delamination. Furthermore, cyclic tensile tests have shown that reducing damage and using stitching help increasing tensile strength. |
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| Keywords: | Carbon/epoxy composite Drilling Stitching Cutting force Delamination Mechanical properties |
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