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1
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Journal of KONES
EN The paper presents a numerical study of a two layer composite panel impacted by an AP (Armour Piercing) 14.5x118mm B32 projectile. The panel consists of a number of pyramid ceramic components supported by an aluminium plate. The studied model is compared with a reference structure in which ceramic l[...]
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Journal of KONES
EN The paper presents a numerical study of the three layer composite panels impacted by an AP (Armor Piercing) 7.62x51mm projectile. The standard panel is built with aluminum and Al2O3 ceramic plate. The studied model, however, consists of the same aluminum plate but the ceramic one is surrounded by a [...]
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Journal of Theoretical and Applied Mechanics
2001 Vol. 39 nr 3 589-620
PL Problemy mechaniki kontaktu - rozwój pęknięć zmęczeniowych w warstwie wierzchniej. Praca dotyczy rozwoju pęknięć zmęczeniowych w warstwie wierzchniej, obecnie jednego z najbardziej aktualnych problemów mechaniki kontaktu. Przedstawia uzyskane przez autorów wyniki eksperymentalnych i numerycznych po[...]
EN The paper deals with the problem of development of fatigue cracks in a surface layer, which is at present one of the most actual issues of contact mechanics. The results obtained by the authors from experimental and numerical investigations of the factors, which exert an essential influence on the p[...]
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Journal of Applied Mathematics and Computational Mechanics
2015 Vol. 14, nr 4 145--152
EN In the paper the mathematical and numerical descriptions of the general case of thermal contact between two flat bodies are presented. The numerical model of the problem is based on the Finite Element Method (FEM). Variable width of the contact gap between interacting bodies is considered. The model[...]
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Journal of Applied Mathematics and Computational Mechanics
EN The article presents the methodology of adjusting the usable properties of rodlike and beam elements for modeling the complex load-bearing structures. The basic object of consideration was the single-row slewing ball bearing. In this paper the mapping issues of usable qualities of the slewing bearin[...]
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Journal of KONES
EN The paper deals with computer simulations of mechanical behaviour of a no-void ideal auxetic isotropic material. Current literature offers wide range of models which resemble the manufactured or natural structures. However, it does not answer the question how a change into auxetic no-void state woul[...]
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Journal of Achievements in Materials and Manufacturing Engineering
EN Purpose: The main purpose is the method of the description of the thermo-mechanical fatigue process of power plant components working under mechanical and thermal loading. The work focuses on the chosen component strain-stress characteristics and their strength. The paper discusses the issue of mode[...]
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Journal of Achievements in Materials and Manufacturing Engineering
2011 Vol. 49, nr 2 305--312
EN Purpose: Analysis of the process of overshooting the material with high speed refers to the identification of certain properties of elasto-dissipative materials. The result of this identification is to determine the value of deformation on the basis of changes in the speed of the projectile inside t[...]
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Biuletyn Wojskowej Akademii Technicznej
PL Artykuł omawia zagadnienie możliwości stosowania określonych uproszczeń w symulacji komputerowej. Stanowi on niezbędny warsztat dla każdego badacza stosującego opisane sposoby modelowania. Weryfikacja uproszczeń numerycznych polegała na przeprowadzeniu trzech testów zderzeniowych dla rdzenia pocisku[...]
EN The paper presents the possibility of applying certain simplifications for computer simulations. It is the essential knowledge for each scientist employing the described methods of modelling. Verification of numerical simplifications consisted in conducting three impact tests for a 7.62 × 51 WC proj[...]
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Bulletin of the Polish Academy of Sciences. Technical Sciences
EN Evolutionary solid bodies undergoing changes of mass, of properties, and of shapes are considered in models of growth and adaptation and similarily in structural optimisation. A fundamental separation of different growth phenomena and a subsequent parametrisation using independent design variables f[...]
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Journal of KONES
EN The paper concerns research and development on modern, ceramic-based, protective layers used in the armour of tanks, combat vehicles and aeroplanes. A task of ceramic panels is reduction and dispersion of localized kinetic energy before a projectile or its fragment approaches the interior of protect[...]
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Journal of KONES
EN The numerical investigations have been performed to determine the effect of the projectile trajectory disturbing during oblique impacts. An impact of the 14.5x118 mm B32 armour piercing projectile on the A12O3 different shape elements backed by 7017 aluminum alloy plate was analyzed. The oblique imp[...]
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Journal of KONES
EN The numerical investigations have been performed to determine the front surface shape effect in the cer based armour systems. Different shapes of ceramic elements were analyzed, including hemispheres and pyramids with respect to standard flat tiles. The influence of the impact point location was als[...]
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Journal of KONES
EN The aim of this paper was to present the main aspects of the numerical modelling within the scope of penetration/perforation problems. The most important stages of the computer model development were discussed in detail. They include the study of the hypervelocity impact physics, selection of the nu[...]
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Journal of Achievements in Materials and Manufacturing Engineering
EN Purpose: The models come from complex rheological models that static and quasi-static loading analysis was presented in the following publications. The main conception of the research is determination of the mechanical properties of ballistic shield materials with the use of the complex constitutive[...]
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Journal of Achievements in Materials and Manufacturing Engineering
2012 Vol. 54, nr 2 242--249
EN Purpose: The aim of the research is to formulate the boundary element approach, develop the computer codes and analyze microstructures containing fibres and cracks. The computer codes can be used to analyze influence of fibres and cracks on stress fields and effective properties of materials. Design[...]
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Journal of Achievements in Materials and Manufacturing Engineering
EN Purpose: In order to achieve better performance and quality, the wheel design and manufacturing use a number of wheel tests (rotating bending test, radial fatigue test, and impact test) to insure that the wheel meets the safety requirements. The test is very time consuming and expensive. Computer si[...]
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Journal of Achievements in Materials and Manufacturing Engineering
EN Purpose: The article presents an analysis of impact energy dissipation process with selected non-classical dynamic models. Design/methodology/approach: Identification of impact energy dissipation phenomena in mechanical systems with a layered structure (eg. composite ballistic shields) is quite a ch[...]
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Journal of Achievements in Materials and Manufacturing Engineering
EN Purpose: of this thesis is dynamical analysis of complex systems in transportation. Analyzed systems are composed of rotatable rods. Transportation was defined as main motion of rods and the overall system. Design/methodology/approach: The dynamical flexibility method is a leading methodology for dy[...]
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Journal of Achievements in Materials and Manufacturing Engineering
EN Purpose: The aim of the presented work was determination of the biomechanical characteristics of the vascular stent made of stainless steel (Cr-Ni-Mo) and Co-Cr-W-Ni alloy. Additionally, in order to compare obtained results, an experimental analysis of the stent made of stainless steel was carried o[...]
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