Machinability of natural-fibre-reinforced polymer composites: Conventional vs ultrasonically-assisted machining
journal contributionposted on 12.02.2019, 11:45 by Dong Wang, P.Y. Onawumi, S.O. Ismail, H.N. Dhakal, I. Popov, Vadim Silberschmidt, Anish Roy
Natural-fibre-reinforced polymer (NFRP) composites are becoming a viable alternative to synthetic fibre based composites in many industrial applications. Machining is often necessary to facilitate assembly of parts in a final product. This study focuses on a comparative experimental analysis of the effects of conventional drilling (CD) and a hybrid ultrasonically-assisted drilling (UAD) of a hemp fibre-reinforced vinyl ester composite laminate. The results obtained indicate that UAD is more efficient when compared to CD for a range of drilling conditions. It yields lower cutting forces and energy resulting in reduced machining-induced damage in the composite, including diminished burr formation and fibre pull-outs. The holes drilled with UAD exhibit improved surface finish and hole quality when compared to those produced with CD. The study demonstrates the applicability of UAD as a viable machining process for improved machinability of heterogeneous NFRP composite materials.
SOI sincerely acknowledges the funding provided by the Niger-Delta Development Commission of Federal Government, Nigeria (NDDC/DEHSS/2013PGFS/OND/3).
- Mechanical, Electrical and Manufacturing Engineering