Generolo Jono Žemaičio Lietuvos karo akademija

The article presents the methodology of modeling a footbridge structure made of a composite material. A lightweight composite footbridge is proposed, which may find application for small-span crossing of the rivers and other terrain obstacles for military purposes. The construction is characterized by lightweight, easiness of assembly and universal application in various location and conditions. The numerical model of the structure was developed based on a 6-meter prototype, for which a reinforcement was proposed and a detailed numerical analysis was carried out for the 18-meter version.

The aim of this paper is to investigate the ballistic properties of laminates made of light alloys under various configuration and thickness. The laminates were obtained by explosive welding method. Composite components are aluminum alloy AA2519 and titanium alloy Ti6Al4V with the aluminum alloy AA1050 as intermediate layer. The paper describes the influence of the bullet impact energy on the structure of the panel, depending on the configuration of the laminates: thickness of the layers and the applicated heat treatment. Ballistic resistance tests were carried out in accordance with the standards STANAG 4569 Level 2. The results of the research were compared to the ballistic resistance of typical material used for ballistic shields production.