Crushing behaviour of the PVC foam loaded with beaters of various shapes

• Autorzy: Bogusz P. , Gieleta R. , Stankiewicz M. , Konarzewski M.

Identyfikatory

DOI

10.2478/ama-2018-0004

• Języki publikacji: EN

Abstrakty

EN

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.

Słowa kluczowe

EN

polymer foam; polyvinyl chloride foam; hitting with a blunt object; energy absorption; impact tests; experimental mechanics

• Wydawca: Oficyna Wydawnicza Politechniki Białostockiej
• Czasopismo: Acta Mechanica et Automatica
• Rocznik: 2018
• Tom: Vol. 12, no. 1
• Strony: 23--30
• Opis fizyczny: Bibliogr. 24 poz., rys., tab., wykr.

Twórcy

autor

Bogusz P.

• Department of Mechanics and Applied Computer Science Faculty of Mechanical Engineering, Military University of Technology 00-908 Warszawa 46, ul. Gen. Witolda Urbanowicza 2, Poland

autor

Gieleta R.

• Department of Mechanics and Applied Computer Science Faculty of Mechanical Engineering, Military University of Technology 00-908 Warszawa 46, ul. Gen. Witolda Urbanowicza 2, Poland

autor

Stankiewicz M.

• Department of Mechanics and Applied Computer Science Faculty of Mechanical Engineering, Military University of Technology 00-908 Warszawa 46, ul. Gen. Witolda Urbanowicza 2, Poland

autor

Konarzewski M.

• Department of Mechanics and Applied Computer Science Faculty of Mechanical Engineering, Military University of Technology 00-908 Warszawa 46, ul. Gen. Witolda Urbanowicza 2, Poland

Bibliografia

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Uwagi

1. The work has been accomplished under the research project: INNOTECH-K2/IN2/56/182840/NCBR/13 financed by the National Centre of Research and Development (NCBiR).

2. Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2018).