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Analysis of hole quality in drilling GLARE fiber metal laminates

DSpace at IIT Bombay

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Title Analysis of hole quality in drilling GLARE fiber metal laminates
 
Creator PAWAR, OA
GAIKHE, YS
TEWARI, A
SUNDARAM, R
JOSHI, SS
 
Subject ACOUSTIC-EMISSION
TOOL LIFE
COMPOSITE
STACKS
ALLOY
CARBIDE
WEAR
Drilling
GLARE
Fiber metal laminates
Thrust force
Acoustic emission
C-scan
 
Description Glass laminate aluminium reinforced epoxy (GLARE) is an advanced aircraft material because of its excellent fatigue crack resistance, high impact strength, high strength-to-weight ratio and high stiffness-to-weight ratio. While drilling on composite/metal stacks has been investigated, the drilling of GLARE, which consists of several alternate thin layers of aluminium and composites, has not been addressed separately in the open literature. The focus of present experimental work is to understand the cutting mechanism and relative effect of cutting parameters and tool geometry on the delamination and burr formation during drilling of GLARE. Thrust force, torque and acoustic emission (AE) signals were acquired for analyzing the cutting mechanism, burr and delamination formation. Also, several measurements of burrs, delamination and hole size were taken in order to understand the hole quality. It has been observed that, 2-fluted drill is the best out of four different geometries used, giving zero delamination and acceptable burr formation followed by the 4-faceted drills. The conventional 3-fluted and 8-faceted drills that are otherwise superior for drilling of fiber reinforced plastics (FRP) composites, performed poorly in drilling of the GLARE laminates. Analyzing the processing parameters, feed again has a dominant role in controlling delamination and burr formation than speed. (C) 2015 Elsevier Ltd. All rights reserved.
 
Publisher ELSEVIER SCI LTD
 
Date 2016-01-14T13:29:17Z
2016-01-14T13:29:17Z
2015
 
Type Article
 
Identifier COMPOSITE STRUCTURES, 123,350-365
0263-8223
1879-1085
http://dx.doi.org/10.1016/j.compstruct.2014.12.056
http://dspace.library.iitb.ac.in/jspui/handle/100/17617
 
Language en