期刊
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
卷 119, 期 -, 页码 188-195出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesa.2019.01.028
关键词
Natural fibres; Optical microscopy; Machining
资金
- Niger-Delta Development Commission of Federal Government, Nigeria [NDDC/DEHSS/2013PGFS/OND/3]
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.
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