Multi-sensor monitoring of drilling in advanced fiber reinforced composites

A. Chukwujekwu Okafor, A. Sherif El-Gizawy, E. Ugo Enemuoh

Research output: Contribution to journalConference articlepeer-review


This paper investigates the main effects of drilling parameters (cutting speed, feed rate, tool geometry, and tool material) on cutting force and hole quality during drilling of magnamite graphite fiber reinforced polyether ether ketone (AS4/PEEK) composites. The AS4/PEEK is a one hundred and ninety nine-ply [0°/45°/90°/-45°]s laminate composite. Taguchi orthogonal array L9 technique is used to plan a 34 robust experiment. The workpiece is supported on a fixture and mounted on a 3-component piezoelectric transducer Kistler type 9257A model. The response signals (cutting force and acoustic emission) are acquired simultaneously during the drilling experiments. The signals are instantaneously sampled and stored in a pentium computer for later processing. The digitized signals are processed in time domain. Surface profilometer is used to measure the surface roughness of the drilled holes. The optimum drilling condition is determined by meticulous examination of the drilling parameter' s main effects . The responses are analyzed based on Taguchi' s signal-tonoise ratio (SIN) as opposed to the measurement data and analysis of variance (ANOVA). The results show that sensor signals, delamination and surface roughness measurements are well correlated with the drilling parameters. Optimum drill tool materials, drill point angle and cutting conditions have been determined.

Original languageEnglish (US)
Pages (from-to)410-420
Number of pages11
JournalProceedings of SPIE - The International Society for Optical Engineering
StatePublished - Jun 6 1997
Externally publishedYes
EventSmart Structures and Materials 1997: Smart Sensing, Processing, and Instrumentation - San Diego, United States
Duration: Mar 3 1997Mar 6 1997

Bibliographical note

Publisher Copyright:
© 1997 SPIE. All rights reserved.


  • Acoustic emission
  • Advanced composites
  • And Taguchi technique
  • Cutting force
  • Drilling monitoring


Dive into the research topics of 'Multi-sensor monitoring of drilling in advanced fiber reinforced composites'. Together they form a unique fingerprint.

Cite this