Investigation of Drilling Parameters Using Grey Relational Analysis and Response Surface Methodology of Biaxial Glass Fibre Reinforced with Modified Epoxy Resin Composite

Figure 6

Delamination at entrance and exit under three different drills. (a, c, e, g, i, k) Delamination at the entry and exit of a 2 mm thickness specimen. (b, d, f, h, j, l) Delamination at the entry and exit of a 3 mm thickness specimen. (a, b) Delamination at the entrance. (c, d) Delamination at the exit. (e, f) Delamination at the entrance. (g, h) Delamination at the exit. (i, j) Delamination at the entrance. (k, l) Delamination at the exit.

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