EXPERIMENTAL ANALYSIS OF THE SANDWICH COMPOSITES LOADED TO MECHANICAL IMPACT

Abstract

This paper presents the experimental analysis of gravitational impact behaviour of sandwich composite plates. The plates(size 280x280mm) are made of two skins, fabricated from fiber -reinforced polymer type E-glass and a polyurethane foam core. The study was carried out for four sizes of plates: thickness of the core, respectively with 10, 15, 20 and 28 [mm] . The study tracked four stages of tests: arming the system, accelerating the impactor, plate impact, returning after impact. Sandwich board is subject to a concentrated impact using a drop-weight device with an impactor spherical. Based on the results the energy absorbed by the plate after the test has been calculated, based on the energy of the impactor in two states: before and after impact. For the experiment equipment was used in the laboratory of advanced materials strength: systemimpact, high-speed camera, AOS Imaging Studio application software and Excel Office.