Analysis and impacts of chips formation on hole quality during fibre-reinforced plastic composites machining

Sikiru Ismail, Hom Dhakal, Ivan Popov, Johnny Beaugrand

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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This work presents the effect of chips formation types on the quality of drilled holes of natural and conventional hemp and carbon fibre-reinforced plastic (HFRP and CFRP) composites respectively. The results depict that variation in chips morphology depends on drilling parameters, drill geometry and composite compositions (matrix and fibre properties). HFRP samples produced continuous brown ribbon-like chips, which were short and melted at lower feed rate and cutting speed, implying that higher feed rate and cutting speed produced wider, longer and lighter chips. CFRP samples generated discontinuous black powder-like chips, with small and abrasive chips at the same applied drilling parameters. These formation and morphology affected quality of drilled holes: lower surface roughness in CFRP, but lower delamination and drill wear in HFRP samples. Evidently, an increased feed rate, cutting speed and drill diameter caused an increase in chips formation, validating the material removal rate (MRR) model results.
Original languageEnglish
Title of host publicationAdvances in manufacturing technology XXX
EditorsY. M. Goh, K. Case
PublisherIOS Press
ISBN (Electronic) 978-1-61499-668-2
ISBN (Print)978-1-61499-667-5
Publication statusPublished - 8 Sept 2016
Event14th International Conference on Manufacturing Research - Loughborough, United Kingdom
Duration: 6 Sept 20168 Sept 2016

Publication series

NameAdvances in Transdisciplinary Engineering
ISSN (Print)2352-751X
ISSN (Electronic)2352-7528


Conference14th International Conference on Manufacturing Research
Abbreviated titleICMR 2016
Country/TerritoryUnited Kingdom
Internet address


  • chips formation types
  • drilling parameters
  • quality of drilled holes


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