Optimization of Drilling Parameters on Hemp-Pineapple Hybrid Natural Fiber Composites

Abstract

Composites are tailor made heterogeneous materials to meet desired mechanical properties for intended applications. Among all the composites, fiber reinforced composites gained wide attention because of ease in synthesis and light weight. Issues such as delamination and surface finish during drilling of composites offers challenges. The present investigation uses design of experimentation method for setting processing parameters such as drill diameter, feed, rotation speed for evaluation of minimum surface roughness and delamination factor for processed natural hybrid composites in different proportions 1:4, 2:3, 3:2 and 4:1(hemp/pineapple) fiber by keeping epoxy resin of 70% as matrix constituent. Coefficient of variation technique applied for selecting the composites which enable minimum delamination factor and low surface roughness/ high surface finish. Among all the composites, composite-1 (Hemp 6% and 24% pineapple) is the best for above said. Analytically results are well validated experimentally in terms of ultimate tensile strength finding.