Obiekt

Współtwórca:

Edward WŁODARCZYK ; Edward WŁODARCZYK

Abstrakt:

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.
; 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.

Miejsce wydania:

Warszawa
; Warszawa

Wydawca:

Wojskowa Akademia Techniczna ; Wojskowa Akademia Techniczna

Data utworzenia:

2010 r.0

Data złożenia:

2014-07-25 ; 2014-07-25

Data akceptacji:

2015-03-05 ; 2015-03-05

Data wydania:

2015-12-30 ; 2015-12-30

Rozmiar:

B5 ; B5

Identyfikator:

oai:ribes-88.man.poznan.pl:2260

Sygnatura:

doi:10.5604/20815891.1185937 ; doi:10.5604/20815891.1185937

ISSN elektroniczny:

2720-5266

ISSN drukowany:

2081-5891

Język:

angielski ; angielski

Właściciel praw:

Wojskowa Akademia Techniczna ; Wojskowa Akademia Techniczna

Strona początkowa:

7 ; 7

Strona końcowa:

18 ; 18

Tom:

6 ; 6

Słowa kluczowe:

powder metallurgy technology, porous metals, dynamic strains ; powder metallurgy technology, porous metals, dynamic strains