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Application of grey fuzzy logic for the optimization of drilling parameters for CFRP composites with multiple performance characteristics
Authors:A Krishnamoorthy  S Rajendra Boopathy  K Palanikumar  J Paulo Davim
Affiliation:1. Department of Mechanical and Production Engineering, Sathyabama University, Chennai 600 119, Tamilnadu, India;2. Department of Mechanical Engineering, Anna University, Chennai 600 025, Tamilnadu, India;3. Department of Mechanical Engineering, Sri Sairam Institute of Technology, Chennai 600 044, Tamilnadu, India;4. Department of Mechanical Engineering, University of Aveiro, Campus Santiago, 3810-193 Aveiro, Portugal
Abstract:Carbon Fibre Reinforced Plastic (CFRP) composite materials have potential applications in various domains. In machining, drilling is essentially required to join different structures. But CFRP drilling poses many problems that decrease the quality of holes. In this paper, Taguchi’s L27 orthogonal array is used to perform drilling of CFRP composite plates. To improve the quality of the holes drilled, the optimal combination of drilling parameters is chosen using grey relational analysis. Grey fuzzy optimization of drilling parameters is based on five different output performance characteristics, namely, thrust force, torque, entry delamination, exit delamination and eccentricity of the holes. Analysis of variance (ANOVA) is used to find the percentage contribution of the drilling parameters and found that feed rate is the most influential factor in drilling of CFRP composites.
Keywords:CFRP composites  Drilling  Grey relational analysis  Grey fuzzy  Optimization  ANOVA
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