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Wyświetlanie 1-3 z 3
Tytuł:
Experimental and numerical investigation of connector with elastomer joint
Autorzy:
Sławiński, G.
Malesa, P.
Niezgoda, T.
Bogusz, P.
Powiązania:
https://bibliotekanauki.pl/articles/245319.pdf
Data publikacji:
2016
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
elastomer
connector
LS-Dyna
experimental tests
FEM analysis
Opis:
This paper presents works associated with the design, experimental tests and numerical analyses of a composite connector, which is a part responsible for increasing the safety of the soldiers. Nowadays researchers more and more often are searching for modern materials, which, as individual components or structures connected with other materials, meet the requirements of global markets. One of the most important branches of industry, which presently is growing increasingly are high technologies accompanying the safety of soldiers who are the passengers of a military vehicle. The proposed solution allows protection of the sensitive parts of body (e.g. legs), as well as the entire body of a soldier from the risks resulting from the impact of a pressure wave coming from explosion on the vehicle in which the soldier travels. A combination of classic materials, such as steel, and modern materials with hyperelastic characteristics might be an alternative to the currently used shock absorbers and dampers. Perspective can be using this assembly as a connector between a seat and the military vehicle body or special plates for protecting the crew’s feet resting on the floor of the vehicle during explosion of a mine or IED. The analysis is conducted using the LS-DYNA explicit code.
Źródło:
Journal of KONES; 2016, 23, 3; 473-480
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Experimental and numerical investigation of connector with elastomer joint
Autorzy:
Sławiński, G.
Malesa, P.
Świerczewski, M.
Bogusz, P.
Powiązania:
https://bibliotekanauki.pl/articles/243074.pdf
Data publikacji:
2017
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
elastomer
energy absorbing
LS-DYNA
experimental tests
FEM analysis
Opis:
This article presents works associated with the design, numerical analyses and experimental tests of an energyabsorbing mat designed for increasing the safety of the soldiers inside military vehicles, especially their legs. One of the most important branches of engineering interests is high technologies accompanying the safety of soldiers. Energy absorbing mats are one of an additional equipment of a military vehicle, which is directly targeted to increase leg safety during explosion of IED (Improvised Explosive Device) under vehicle. The presented invention allows protection legs of the crew’s feet resting on the floor of the vehicle during explosion of a mine or IED. In most solutions, crewmembers’ foot rests directly on the floor, causing serious injuries. The value of the load on the metatarsus and tibia is closely related to the overall vehicle structure, which generally has limitations in the use of available external and internal protection solutions. Energy absorbing mats are a universal solution because they are adaptable to any type of vehicle. Their role is particularly important in flat-bottomed armoured vehicles. The article will show the results of the analysis showing how the mat works. Experimental results will be compared with the results of numerical analysis. The analysis is conducted using the LS-DYNA explicit code.
Źródło:
Journal of KONES; 2017, 24, 3; 283-289
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Crushing behaviour of the PVC foam loaded with beaters of various shapes
Autorzy:
Bogusz, P.
Gieleta, R.
Stankiewicz, M.
Konarzewski, M.
Powiązania:
https://bibliotekanauki.pl/articles/387664.pdf
Data publikacji:
2018
Wydawca:
Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:
polymer foam
polyvinyl chloride foam
hitting with a blunt object
energy absorption
impact tests
experimental mechanics
Opis:
Statistically, at least 50% of all injuries experienced by police officers in the line of duty are due to assaults with blunt objects. Therefore, vests used by the police should provide not only good ballistic resistance, but also good protection against such threats. Foamed materials are possible to be used for body protectors or inserts of protective clothes. The effects of dynamic impact with beaters of different shapes onto behaviour of polymeric foamed material were determined. There were used four types of beaters: flat, cylindrical, edgy and cornered. Strikes with blunt objects such as a flat board, baseball bat, edgy brick, pavement brick or a sharp stone, to which a protective ware can be subjected, were simulated. The impact load was applied to the rectangular specimens, made of polyvinyl chloride foam, with a usage of a drop hammer. Plots of force versus compression for all the tested samples were obtained and analysed. The effects of impacts with beaters of different shapes onto foamed material samples were presented. A shape of the blunt object significantly influences crushing behaviour of the foamed material. The impact energy of a flat beater is absorbed effectively on a short distance, since it is spread on a relatively large surface. The cylindrical and edgy beaters did not cause fragmentation of the samples, however, on the upper surfaces of the samples, permanent deformations mapping the beaters shapes as well as some cracks occurred. An impact with a sharp object, for example, a cornered beater is very difficult to be neutralized by the foam material, because it is cumulated on a small area.
Źródło:
Acta Mechanica et Automatica; 2018, 12, 1; 23-30
1898-4088
2300-5319
Pojawia się w:
Acta Mechanica et Automatica
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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