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Ecofriendly inclined drilling of carbon fiber-reinforced polymers (CFRP)

Lookup NU author(s): Dr Dehong Huo



This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).


© 2020, The Author(s). Key composite made aerostructures such as fuselage inner walls, flap support fairings, empennage ribs, and the vertical fin ribs are comprised of non-vertical inclined and radial holes that join with other key metallic and non-metallic structures. Carbon fiber reinforced plastics (CFRP) are also used in the aerospace, automotive, marine, and sports-related applications due to their superior properties such as high strength to weight ratio, better fatigue, and high stiffness. CFRP drilling operation is different than the homogenous materials as the cutting-edge interacts with fiber and matrix simultaneously. Flank face of the tool rubs on the workpiece material and develops high frictional contact due to the elastic recovery of broken fibers. Lubrication during CFRP cutting can reduce the friction involved at tool-workpiece interface to enhance cutting performance. Dry cutting, cryogenic machining, and minimum quantity lubrication (MQL)-based strategies are termed as ecofriendly cooling/lubrication methods when machining high performance materials. The abrasive nature of carbon fiber is responsible of producing cutting forces which leads to different types of imperfections such as delamination, uncut fiber, fiber breakout, and fiber pullout. The integrity of CFRP drilled hole especially at the entry and exit of the hole plays a significant role towards the overall service life. The presented paper aims to characterize the interrelationships between hole inclination, lubrication/cooling methods, tool coating, and drill geometry with inclined hole bore surface quality and integrity during drilling of CFRP laminates. In dry cutting, thrust forces were found 2.38 times higher in the 30° inclination when compared with the reference 90° conventional inclination angle. Compressed air provided lowest increase (1.46 times) in the thrust forces for 30° inclination.

Publication metadata

Author(s): Pervaiz S, Kannan S, Huo D, Mamidala R

Publication type: Article

Publication status: Published

Journal: International Journal of Advanced Manufacturing Technology

Year: 2020

Volume: 111

Issue: 7-8

Pages: 2127-2153

Print publication date: 01/12/2020

Online publication date: 23/10/2020

Acceptance date: 29/09/2020

Date deposited: 19/11/2020

ISSN (print): 0268-3768

ISSN (electronic): 1433-3015

Publisher: Springer Science and Business Media Deutschland GmbH


DOI: 10.1007/s00170-020-06203-y


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Funder referenceFunder name
American University of Sharjah (AUS)
Dubai Silicon Oasis Authority (DSOA)
Rochester Institute of Technology-Dubai (RIT-D)