Author(s)

W. Barnat, T. Niezgoda, R. Panowicz & K. Sybilski

Abstract

Energy absorbing composite elements, which can be used for the protection of people, vehicles and structures, have been widely investigated in recent years. Different kinds of materials (metals, composites, foams) and structures have been investigated. Many articles present the glass, carbon and aramid composites investigation results. The sleeve and conical structures are described. The impact energy in these elements is absorbed during the progressive fracture process. Glass composites are very popular due to their low cost. This paper deals with numerical and experimental research on the possibilities of energy absorption by a conical element made from a glass composite in comparison with a conical composite element filled with polyurethane foam. One element and a small composite panel are investigated and compared. Keywords: blast wave, energy absorbing element and panel. 1 Introduction The problem of energy dissipation by composite absorbing elements is considered from an aspect of the local stability loss or a progressive destruction [1, 2]. The work, carried out by the destruction of an energy-absorbing element, causes a significant limitation of shock load effects of the construction, for example an impact of the landing platform or an airship with the ground, or the influence of a pressure wave created by an explosion [3]. The greatest absorption energy in relation to a mass unit is possessed by the elements made of composite [4].

Keywords

blast wave, energy absorbing element and panel