Detecting Safety Zone Drill Process Parameters for Uncoated HSS Twist Drill in Machining GFRP Composites by Integrating Wear Rate and Wear Transition Mapping

Table 1

GFRP composite specifications.

Matrix material	Isophthalic polyester resin
Fiber	S-glass fiber
Fiber diameter	15 microns
Fabric type	Stitched mat type
Fiber orientation	Random
Fiber weight fraction	33%
Material density	1.6 g/mm^3
Laminate thickness	10 mm