This paper aims to understand the dynamics of drilling of high volume fraction glass fibre reinforced composite. This type of composite is currently used in ballistic applications. At high fibre volume, fibres do not show much relaxation and normal hole shrinkage associated with polymeric composites is not observed during drilling. Peak drilling thrust, dimension of holes drilled and vibration induced during drilling are observed to correlate with each other. Vibrations study has been attempted through wavelet packet transform and the results demonstrated its capability in signal characterisation. © 2004 Elsevier Ltd. All rights reserved.

Ramalingam Krishnamurthy

Delamination

Drilling

Fourier transforms

machinability

Matrix algebra

Military vehicles

Torque

Wavelet transforms

DRILLING CHARACTERISTICS

GFRP COMPOSITES

High volume fraction

Vibration

WAVELET PACKET TRANSFORMS

Glass fiber reinforced plastics

IIT Madras is a public technical and research university located in Chennai, Tamil Nadu. Founded in 1959, it is recognised as an Institute of National Importance.

IIT Madras has been ranked as the top engineering institute in India for four years in a row by the National Institutional Ranking Framework of the MHRD

It currently offers undergraduate, postgraduate and research degrees across 16 disciplines in Engineering, Sciences, Humanities and Management. About 596 faculty belonging to science and engineering departments and centres of the Institute are engaged in teaching, research and industrial consultancy.

IIT Madras

International Journal of Machine Tools and Manufacture

Glass fibre reinforced polyester composites (GRP) and hybrid nanoclay and glass fibre reinforced polyester nanocomposites (CGRP) are fabricated by vacuum assisted resin infusion technique. The optimum mechanical properties are obtained for CGRP with 3 wt.% nanoclay. Three types of drills (carbide twist drill D 5407060, HSS twist drill BS-328, and HSS end mill (4 flutes "N"-type end mill RH-helical flute)) of 6 mm diameters are used to drill holes on GRP and CGRP. Three different speeds (600, 852, and 1260 rpm) and two different feeds (0.045, 0.1 mm/rev) are selected as process parameters. The effect of process parameter on thrust force and delamination during drilling CGRP is analyzed for optimizing the machining parameters. The delamination factor is low for the optimum process parameter (feed = 0.1 mm/rev and speed 852 rpm). Microstructural analysis confirms that at higher feeds, delamination is low for CGRP drilled with carbide tools. In order to analyze the effect of nanoclay in CGRP on tool wear, 200 holes were drilled on CGRP samples with 3 wt.% nanoclay, and the tool wear is analyzed under optimized parametric condition. Tool wear is high in HSS twist drill compared with carbide drill. The presence of nanoclay also accelerates the tool wear. © 2013 P. Prabhu et al.

Fulltext

International Journal of Polymer Science

Machinability study of hybrid nanoclay-glass fibre reinforced polyester composites

Journal of Materials Research and Technology

Drilling on fiber reinforced polymer/nanopolymer composite laminates: a review

IEEE Transactions on Industrial Electronics

Wavelet packet feature extraction for vibration monitoring

On-line detection of the breakage of small diameter drills using current signature wavelet transform

Journal of Manufacturing Science and Engineering

Multi-Category Classification of Tool Conditions Using Wavelet Packets and ART2 Network

Machining Science and Technology

MACHINING OF FIBER-REINFORCED COMPOSITES

JSME International Journal Series C

Monitoring of Tool Wear States in Turning Based on Wavelet Analysis.

Evaluation of drilling characteristics of high volume fraction fibre glass reinforced polymeric composite

Journal	International Journal of Machine Tools and Manufacture
ISSN	08906955
Open Access	No