Effects of Cutting Parameters on Hole Integrity when Drilling GFRP and HFRP Composites

Abstract:

The demand for mechanical fastening in composite materials is increasing due to their potential in large assemblies, aerospace and automotive industries. In practice, small components are integrated into large assemblies drilling holes in composite materials. Drilling defect free holes in composite presents many challenges during part assembly and services. This study presents the effects of cutting parameters used for drilling holes in glass fiber reinforced polymeric (GFRP) composites and hybrid fiber reinforced polymeric (HFRP) composites. Both the composites plates of 3 mm thickness were fabricated using a hand lay-up technique for the purpose of evaluating the effects of parameters on the quality of drilled holes. The holes were drilled using a 5 mm solid carbide twist drill at different spindle speed and feed rate. The quality of holes was assessed with respect to damage factor (F_d) and surface roughness (Ra) of the drilled holes. Results showed that the HFRP composite experienced lower damage factor (F_d) as compared to GFRP composite at lower feed rate or spindle speed. Scanning electron microscopic (SEM) examination revealed that the occurrence of delamination, fiber pull-out and matrix cracking was accelerated in the drilled holes at high spindle speed and feed rate.

• Periodical: Advanced Materials Research (Volume 845)
• Pages: 960-965
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.845.960
• Online since: December 2013
• Authors: Mohd Azuwan Maoinser, Faiz Ahmad*, Safian Sharif
• Keywords: Carbon Fiber Composites, Drilling, Drilling Quality, Glass Fiber Composites

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