Drilling in carbon/epoxy composites: Experimental investigations and finite element implementation |
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| Affiliation: | 1. Department of Mechanical Engineering, Universidad Carlos III de Madrid, Avda. Universidad 30, 28911 Leganés (Madrid), Spain;2. Department of Aerospace and Biomedical Engineering, Universidad Carlos III de Madrid, Avda. Universidad 30, 28911 Leganés (Madrid), Spain;3. Department of Continuum Media and Structural Analysis, Universidad Carlos III de Madrid, Avda. Universidad 30, 28911 Leganés (Madrid), Spain;1. Institut Clément Ader (ICA), IUT-A of Toulouse Université, 133c, avenue de Rangueil, 31077 Toulouse cedex, France;2. Department of Production Engineering, PSG College of Technology, Coimbatore 641004, India;3. Université de Toulouse; CNRS, Mines Albi, INSA, UPS, ISAE-SUPAERO; ICA (Institut Clément Ader); Campus Jarlard, F-81013 Albi, France;1. Industrial Doctorate Centre in Machining Science, Department of Mechanical Engineering, The University of Sheffield, Sir Frederick Mappin Building, Mappin Street, Sheffield S1 3JD, UK;2. Sandvik Coromant, Sandvik AB, Advanced Manufacturing Park, Unit 8, Morse Way, Waverley, Sheffield S60 5BJ, UK;3. Advanced Manufacturing Research Centre with Boeing, The University of Sheffield, Advanced Manufacturing Park, Wallis Way, Catcliffe, Rotherham S60 5TZ, UK;4. Leonardo Tribology Centre, Department of Mechanical Engineering, The University of Sheffield, Sir Frederick Mappin Building, Mappin Street, Sheffield S1 3JD, UK;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. 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 |
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| Abstract: | Drilling carbon fibre reinforced plastics (CFRPs) is typically cumbersome due to high structural stiffness of the composite and low thermal conductivity of plastics. Resin-rich areas between neighbouring plies in a laminate are prone to drilling-induced delamination that compromises structural integrity. Appropriate selection of drilling parameters is believed to mitigate damage in CFRPs. In this context, we study the effect of cutting parameters on drilling thrust force and torque during the machining process both experimentally and numerically. A unique three-dimensional (3D) finite element model of drilling in a composite laminate, accounting for complex kinematics at the drill-workpiece interface is developed. Cohesive zone elements are used to simulate interply delamination in a composite. Experimental quantification of drilling-induced damage is performed by means of X-ray micro computed tomography. The developed numerical model is shown to agree reasonably well with the experiments. The model is used to predict optimal drilling parameters in carbon/epoxy composites. |
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