Drilling analysis of chopped composites |
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| Affiliation: | 1. Mechanical Design and Production Engineering Department, Faculty of Engineering, Zagazig University, P.O. Box 44519 Zagazig, Egypt;2. Mechanical Engineering Department, Alabama A&M University, Normal, AL 35762, USA;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;1. Indian Institute of Technology, Bombay, India;2. Indian Institute of Technology, Bombay, India;3. Kalyani Centre of Technology and Innovation, Bharat Forge Ltd. Pune, India;1. School of Engineering, Cardiff University, Cardiff CF24 3AA, UK;2. Kluyverweg 1, 2629 HS Delft, Delft University, The Netherlands;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. Department of Mechanical Engineering, National Institute of Technology Meghalaya, Meghalaya, 793 003, India;2. Department of Mechanical Engineering, St. Ann’s College of Engineering and Technology, Andhra Pradesh, 523 187, India |
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| Abstract: | This work investigates the effects of the drilling parameters, speed, and feed, on the required cutting forces and torques in drilling chopped composites with different fiber volume fractions. Three speeds, five feeds, and five fiber volume fractures are used in this study. The results show that feeds and fiber volumes have direct effects on thrust forces and torques. On the other hand, increasing the cutting speed reduces the associated thrust force and torque, especially at high feed values. Using multivariable linear regression analysis, empirical formulas that correlate favorably with the obtained results have been developed. These formulas would be useful in drilling chopped composites. The influence of cutting parameters on peel-up and push-out delaminations that occurs at drill entrance and drill exit respectively the specimen surfaces have been investigated. No clear effect of the cutting speed on the delamination size is observed, while the delamination size decreases with decreasing the feed. Delamination-free in drilling chopped composites with high fiber volume fraction remains as a problem to be further investigated. |
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