Comparison of Diameter and Area Change Based Methods for Evaluating Break-IN and Break-OUT Damages in Dry Drilled Holes of Aeronautical Carbon Fiber Composites

Abstract:

Currently, Carbon Fiber Reinforced Non-Metal Composites (CFRC) are commonly applied in structural components of aircrafts. Frequently, these elements need to be drilled for their assembly in the final product. Chips close to powder are formed when this kind of material is machined. Because of this, drilling processes are mostly performed in absence of cutting fluids. High quality requirements are demanded for holes due to the fact than those elements are placed in key components of the aircrafts. The most relevant defects that can be produced in the dry drilling of CFRC are located in the both tool input and tool output. These defects are known as Break-IN (B-IN) and Break-OUT (B-OUT). This paper reports on the results of a comparative study of different methodologies for evaluating those defects. First of them is based on the analysis of the diameter deviation. Second procedure is based on the damaged area. Both parameters have been measured making use of image analysis techniques. Obtained results have revealed that damaged area based method is more sensitive to hole changes.

• Periodical: Materials Science Forum (Volume 797)
• Pages: 35-40
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.797.35
• Online since: June 2014
• Authors: Pedro Francisco Mayuet*, Pedro Arroyo, Alberto Portal, Miguel Álvarez, Severo Raúl Fernández-Vidal, Mariano Marcos Bárcena
• Keywords: Break-IN, Break-OUT, Carbon Fiber Composites, Dry Drilling

References

[1] P. F. Mayuet, M. Álvarez, A. Portal, P. Arroyo, M. Marcos. 2013. Tecnologías para el taladrado de materiales aeronáuticos avanzados, MetalMecanica, Information on: http: /www. interempresas. net/MetalMecanica/Articulos/101182-Tecnologias-para-el-taladrado-de-materiales-aeronauticos-avanzados. html. Spain.

DOI: 10.35376/10324/43489

[2] L. DeFu, T. YongJun, W. L. Cong. A review of mechanical drilling for composite laminates, Composite Structures (2012) vol. 94, 1265-1279.

DOI: 10.1016/j.compstruct.2011.11.024

[3] A. M. Abrao, P. E. Faria, J. C. Campos Rubio, P. Reis, J. Paulo Davim. Drilling of fiber reinforced plastics: A review. Journal of Material Processing Technology (2007) vol. 186, 1-7.

DOI: 10.1016/j.jmatprotec.2006.11.146

[4] S. Rawat, H. Attia. Wear Mechanism and Tool Life Management of WC-Co Drill During Dry High Speed Drilling of Woven Carbon Fibre Composites (2009) Wear 267, 1022-1030.

DOI: 10.1016/j.wear.2009.01.031

[5] S. C. Lin, I. K. Chen. Drilling carbon fiber-reinforced composite material at high speed. Wear (1996) vol. 194, 156-162.

DOI: 10.1016/0043-1648(95)06831-7

[6] R. Piquet, B. Ferret, F. Lachaud, P. Swider. Experimental analysis of drilling damage in thin carbón/epoxy plate using special drills. Composites: part A. Applied science and manufacturing (2000) vol. 131, 1107-1115.

DOI: 10.1016/s1359-835x(00)00069-5

[7] H. Hocheng, C. C. Tsao. The path towards delamination-free drilling of composite materials. Journal of Material Processing Technology (2005), vol 167, 251-264.

DOI: 10.1016/j.jmatprotec.2005.06.039

[8] C. C. Tsao, Y. C. Chiu. Evaluation of drilling parameters on thrust force in drilling carbon fiver reinforced plastic (CFRP) composite laminates using compound core-special drills. International Journal of Machine Tools & Manufacture (2011).

DOI: 10.1016/j.ijmachtools.2011.05.004

[9] H. Hocheng, C. C, Tsao. Comprehensive analysis of delamination in drilling of composite materials with various drills bits. Journal of Material Processing Technology (2004), vol 140, 335-339.

DOI: 10.1016/s0924-0136(03)00749-0

[10] A. Faraz, et al. Cutting Edge Rounding: An Innovate Tool Wear Criterion in Drilling CFRP Composite Laminates, International Journal of Machine Tools & Manufacture (2009), vol 49, 1185-1196.

DOI: 10.1016/j.ijmachtools.2009.08.002