Ultrasonic Vibratory Drilling Carbon Fiber/Graphene Nanoparticle Reinforced Polymers to Produce Desired Hole Quality: Experimental Analysis and Optimization

Document Type : Research Article

Authors

1 Arak University of Technology, arak, Iran

2 Kashan University

Abstract

Carbon fiber reinforced polymers (CFRP) are widely used in advanced applications due to their superb specifications. One of the principal problems in drilling such polymers is delamination that deteriorates the composite strength and can lead to part rejection during assembly. Ultrasonic vibration assisted drilling is a new developed machining method that induces higher workpiece quality. In this study, a comprehensive experimental examination was conducted with both mechanical and materialistic view. The materialistic parameters include graphene nanoparticles (GNP) and lay-up arrangement. Furthermore, the mechanical parameters include drilling feed rate, tool type and ultrasonic vibration. To follow this aim, different CFRP specimens were fabricated with various lay-up arrangement and GNP amounts. Besides, analysis of variance was utilized to indicate the significant parameters. The results showed that the feed rate has the most effect on thrust force and delamination damage. Besides, GNP% and tool type were the significant parameters on delamination. To find the optimal settings, grey relational analysis was used. That was suggested to produce CFRP segments with symmetrical lay-up arrangements to reduce delamination damage. Furthermore, lower feed rate value with 5% cobalt HSS tool was suggested. Exerting ultrasonic vibration on the tool was also beneficial to improve the hole quality.

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AUT Journal of Mechanical Engineering
Volume 9, Issue 2
2025
Pages 195-210

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