Advances in materials Research

  • 제11권4호
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  • Pages.375-390
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  • 2022
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  • 2234-0912(pISSN)
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  • 2234-179X(eISSN)
테크노프레스 (Techno-Press)
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Evaluation of delamination in the drilling of CFRP composites

  • Feroz, Shaik (Department of Mechanical Engineering, Vignan's foundation for Science, Technology and Research) ;
  • Ramakrishna, Malkapuram (Department of Mechanical Engineering, Vignan's foundation for Science, Technology and Research) ;
  • K. Chandra, Shekar (Department of Mechanical Engineering, Vignan's Institute of Technology and Science) ;
  • P. Dhaval, Varma (Department of Mechanical, Materials and Manufacturing, University of Nottingham)
  • 투고 : 2022.02.06
  • 심사 : 2022.10.28
  • 발행 : 2022.12.25
⟨ 이전 논문 다음 논문 ⟩

초록

Carbon Fiber Reinforced Polymer (CFRP) composite provides outstanding mechanical capabilities and is therefore popular in the automotive and aerospace industries. Drilling is a common final production technique for composite laminates however, drilling high-strength composite laminates is extremely complex and challenging. The delamination of composites during the drilling at the entry and exit of the hole has a severe impact on the results of the holes surface and the material properties. The major goal of this research is to investigate contemporary industry solutions for drilling CFRP composites: enhanced edge geometries of cutting tools. This study examined the occurrence of delamination at the entry and exit of the hole during the drilling. For each of the 80°, 90°, and 118°point angle uncoated Brad point, Dagger, and Twist solid carbide drills, Taguchi design of experiments were undertaken. Cutting parameters included three variable cutting speeds (100-125-150 m/min) and feed rates (0.1-0.2-0.3 mm/rev). Brad point drills induced less delamination than dagger and twist drills, according to the research, and the best cutting parameters were found to be a combination of maximum cutting speed, minimum feed rate, and low drill point angle (V:150 m/min, f: 0.1 mm/rev, θ: 80°). The feed rate was determined to be the most efficient factor in preventing hole entry and exit delamination using analysis of variance (ANOVA). Regression analysis was used to create first-degree mathematical models for each cutting tool's entrance and exit delamination components. The results of optimization, mathematical modelling, and experimental tests are thought to be reasonably coherent based on the information obtained.

키워드

과제정보

There are no conflicts among the authors and no external agencies have funded this study.

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