Effects of drilling parameters on delamination of glass-epoxy composites

Faramarz Ashenai Ghasemi^*, A. Hyvadi, Gholamhassan Payganeh, N. B. M. Arab

Australian Journal of Basic and Applied Sciences, Vol. 5, Issue 12, 2011(12), Pages 1433-1440. (ISI)

Abstract

Drilling composite materials is considered a critical and sensitive operation because these materials are delaminated under the stresses caused by drilling operation. In this paper, the effects of feed rate, drill rotation speed and drill point angle on delamination factor in polymer-based composite laminate reinforced by E-glass fibers are studied. To this end, each of the mentioned parameters was defined at three levels using full factorial technique of design of experiments. During conducting the experiments, the drilling force was measured using a dynamometer. The amount of delamination factor was computed by scanning the exit hole of the drilled area. Using analysis of variance (ANOVA), the collected experimented data were analyzed. The results indicated that the delamination factor increased at low and high values of the parameters within the considered experimental range of the parameters. At the end, the optimum values of parameters were determined in order to minimize delamination.

Key words

Drilling; Composite; Delamination; Glass-epoxy.

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