Challenges to national defence in contemporary geopolitical situation

Military operation in rough terrain are very often conducted as dismounted operation. In this condition the logistic support is very problematic because all equipment is carried by soldier. It reduces the mobility and agility of troops. In the paper the demand for supporting dismounted operation UGV are described and concept of robot’s solutions are presented.

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.

In the paper the possibility of river crossing in different conditions are described. The influence of river and equipment characteristics are analyzed and existing unitation on crossing capacity are indicated. Moreover, the unique demand for river crossing in Eastern Europe are defined.

This paper presents a review of the advanced materials used in the structure of a novel armor systems and the bodies or frames of the military equipment and vehicles. One of the most often materials engaged in armors are the ceramics among of which the aluminium oxides are the widest spread. Nevertheless, there are more advanced ceramics alike a silicon carbide or boron carbide used for example to shield the pilots of assault helicopters. The section of the paper concerning the materials for the bodies is focused on the high strength steels and the conditions of appropriate joints realization. The examples of the welding imperfections were showed and its influence on the structure integrity was discussed taking into account also others factors.

In contemporary conflicts the IED and mines threats are growing. In paper the concept of using engineer robots in counter IED operation are described. To fulfil this analyses the cooperation between varied class robots are proposed.

Presented paper shows results of the tensile strength of the rGO-PDMS composite (pure PDMS doped with reduced graphene oxide (rGO). As a result, the relative elongation of the rGO-PDMS was obtained reaching 600% as compared to control samples before breaking of the composite. Microfractographic measurements of fracture in static tensile test showed delamination in places where rGO flakes were present, what favored the initiation of breaking process. The decrease of the Young module was observed by 8% when PDMS was doped with reduced graphene oxide.

Soft X-rays assisted modification of polymeric nanocomposites containing metal nanoparticles has been performed and radiation induced changes of their physical and chemical properties have been investigated. Thin composite layers were formed on polished glass substrates applying spin-coating technique for composite deposition from solution containing metal powder additives. Synthesis of metal nanoparticles was performed directly in the deposited PMMA layer applying photocatalytic method (UV irradiation), which was followed by sample irradiation with soft X-rays. The surface morphology, composition and microstructure of samples were assessed using scanning electron microscope, energy dispersive X-ray spectroscopy and optical microscopy. Also UV-VIS spectrometry and FTIR spectrometry were applied for characterization of nanocomposites. It was found that the soft X-ray irradiation contributed to the formation of new Ag particles and their agglomeration into larger clusters within the polymer matrix causing changes of structural and optical properties of polymeric nanocomposites. Mechanisms of low-dose rate X-ray radiation induced structural changes in polymeric composites, processes promoting formation of new particles in polymers; particles growth and clusterization within polymer matrix have been discussed analyzing changes of physical and chemical properties of nanocomposites before and after their X- ray irradiation.

This paper the contain description of possibility of future combat engineer task robotization. The analysis is focused on most dangerous task like engineer obstacle breaching including mine fields, fence and other barriers. In the paper are described proposals of new technics and tactics for using robots and demand for their new possibilities.

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.

This paper the contain description of possibility of future combat engineer task robotization. The analysis is focused on most dangerous task like engineer obstacle breaching including mine fields, fence and other barriers. In the paper are described proposals of new technics and tactics for using robots and demand for their new possibilities.