Object

Contributor:

Edward WŁODARCZYK

Abstract:

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.

Place of publishing:

Warszawa

Publisher:

Wojskowa Akademia Techniczna

Date created:

2010 r.0

Date submitted:

2014-07-25

Date accepted:

2015-03-05

Date issued:

2015-12-30

Extent:

B5

Identifier:

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

Call number:

doi:10.5604/20815891.1185937

Electronic ISSN:

2720-5266

Print ISSN:

2081-5891

Language:

angielski

Rights holder:

Wojskowa Akademia Techniczna

Starting page:

7

Ending page:

18

Volume:

6

Keywords:

powder metallurgy technology, porous metals, dynamic strains