Faruk Elaldi
University of Baskent, Turkey
Title: A numerical and experimental analysis for the effect of impactors geometry on carbon reinforced composite materials
Biography
Biography: Faruk Elaldi
Abstract
For the last two decade, composite materials are increasingly preferred due to the specific modulus and specific strengths at body parts, structural part of aircraft and military systems. Composite materials are sometimes exposed to invisible or visible deformation due to impact loading during service. In this study, the effect of impactors with four different contact surfaces and geometry on carbon fiber reinforced composite plates having three different thicknesses are investigated. At the first stage, for low velocity impact test, FE analysis has been performed in order to determine optimum ply orientations which will give high resistance to full penetration. Later, composite plates were manufactured with the ply orientations of [45/-45/0/90/45/-45]2s, [45/-45/0/90/45/-45]3s, [45/-45/0/90/45/-45]4s based on FE analysis. At the second stage, carbon reinforced composite test panels were exposed to low velocity impact tests to get force-time, energy-time and force-displacement curves. Finally, ballistic limits which give impact energy levels for semi and full penetration of composite panels were determined and verified with numerical analysis.