Experimental Analysis of Local and Average Dynamic Longitudinal Engineering Compressive Strains in Ductile Porous Rod After the Taylor Direct Impact Experiment

• Autorzy: Włodarczyk E. , Sarzyński M.

Identyfikatory

DOI

10.5604/20815891.1185937

• Języki publikacji: EN

Abstrakty

EN

The recent experimental method for determining dynamic longitudinal engineering compressive local strain, εl (x), (x is Lagrangian coordinate) and average one, εa, in a ductile porous rod, plastically deformed by Taylor direct impact experiment (Taylor DIE) is presented in this paper. Analysis of strain distribution, εl (x), along axis of the rod was performed by means of this method. There are two essential singularities in this distribution, namely: the first - the maximum compressive strain, εl max, there is in a near of the striking end rod, but it does not locate on the target face; and the second - at high loading (impact velocity), value of the maximum, εl max, decreases together with increasing of initial rod porosity, inversely than at static loading. The values of the strains εl (x) and εa are limited by the impact velocity U. Influence of the moderate porosity (e.g. for copper - Δsa < 20%) on values of the εl (x) and εa is in the order of several percent and it may be neglected.

Słowa kluczowe

EN

powder metallurgy technology; porous metals; dynamic strains

• Wydawca: Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego
• Czasopismo: Problemy Mechatroniki : uzbrojenie, lotnictwo, inżynieria bezpieczeństwa
• Rocznik: 2015
• Tom: Vol. 6, Nr 4 (22)
• Strony: 7--17
• Opis fizyczny: Bibliogr. 10 poz., il., tab., wykr.

Twórcy

autor

Włodarczyk E.

• Military University of Technology, Faculty of Mechatronics and Aerospace, 2 S. Kaliskiego St., 00-908 Warsaw, Poland

autor

Sarzyński M.

• Military University of Technology, Faculty of Mechatronics and Aerospace, 2 S. Kaliskiego St., 00-908 Warsaw, Poland

Bibliografia

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• [4] Hawkyard J.B., Eaton D., Johnson W., The mean dynamic yield strength of cooper and low carbon steel at elevated temperatures from measurements of the mushrooming of flat-ended projectiles, Int. J. Mech. Sci. 10, pp. 929-948, 1968.
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• [10] Włodarczyk E., Sarzyński M., Analysis of dynamic parameters in a metal cylindrical rod striking a rigid target, Journal of Theoretical and Applied Mechanics (JTAM), 51, 4, pp. 847-857, 2013.