Machinability of natural-fibre-reinforced polymer composites: Conventional vs ultrasonically-assisted machining
journal contributionposted on 12.02.2019 by Dong Wang, P.Y. Onawumi, S.O. Ismail, H.N. Dhakal, I. Popov, Vadim Silberschmidt, Anish Roy
Any type of content formally published in an academic journal, usually following a peer-review process.
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