Defects Study on Drilling of Carbon Fiber Reinforced Polymer (CFRP) Laminates

Abstract:

The new developed carbon fiber reinforced polymer laminates are widely used in main structural components of big commercial aircrafts. Generally drilling is the final operations in manufacturing structure, which is the most important operation during assembly. Defects such as burrs and delamination always appear in the process of drilling, which makes it hard to control the drilling quality. In this research, the drilling defects of T800 CFRP laminates are evaluated by using a brad point drill and a multifacet drill in terms of drilling forces, burr defect and delamination detection. The results show that the spindle speed is the most significant factor affecting the delamination defect followed by the feed rate. High speed drilling and low feed rate could improve the surface quality and reduce the delamination. The multifacet drill showed excellent drilling performance than the brad point drill and generated smaller defects.

• Periodical: Materials Science Forum (Volumes 800-801)
• Pages: 61-65
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.800-801.61
• Online since: July 2014
• Authors: Kun Xian Qiu*, Cheng Dong Wang, Qing Long An, Ming Chen
• Keywords: Burr Defect, Carbon Fiber Reinforced Polymer (CFRP), Drilling Force

References

[1] Abrão, A. M., Faria, P. E., Rubio, J. C. C., Reis, P. and Davim, J. P., Drilling of Fiber Reinforced Plastics: A Review, J. Mater. Process. Technol., Vol. 186, No. 1-3, pp.1-7, (2007).

DOI: 10.1016/j.jmatprotec.2006.11.146

[2] Yang, I. Y., Jeong, J. Y. and Kim, J. H., Fracture Toughness of CFRP Laminated Plates According to Resin Content, Int. J. Precis. Eng. Manuf., Vol. 11, No. 2, pp.309-313, (2010).

DOI: 10.1007/s12541-010-0035-y

[3] Soutis, C., Fibre Reinforced Composite in Aircraft Construction, Prog. Aerosp. Sci., Vol. 41, No. 2, pp.143-151, (2005).

[4] Khashaba, U.A., Seif, M.A., Elhamid, M.A. Drilling Analysis of Chopped Composites. Composites: Part A, 38 (2007): 61-70.

DOI: 10.1016/j.compositesa.2006.01.020

[5] Khashaba, U.A. Delamination in Drilling GFR-thermoset Composites. Journal of Composite Structures. 63 (2004): 329-338.

DOI: 10.1016/s0263-8223(03)00180-6

[6] Tsao, C.C. Experimental Study of Drilling Composite Materials with Step-core Drill. Materilas and Design 29 (2008): 1740-1744.

DOI: 10.1016/j.matdes.2008.03.022

[7] Chen, W.C. Some Experimental Investigation in the Drilling of Carbon Fiber-reinforced Plastic (CFRP) Composites Laminates. International Journal of Machine Tools and Manufacture 37 (1997): 1097-1108.

DOI: 10.1016/s0890-6955(96)00095-8