%0 Journal Article
%T Two dimensional plastic waves in quasi rate independent viscoplastic materials
%A Mi£¿unovi£¿ M.V.
%A Albertini C.
%A Grillo A.
%A Muha I.
%J Theoretical and Applied Mechanics
%D 2011
%I Serbian Society of Mechanics, Belgrade
%R 10.2298/tam1101047m
%X The subject of this work is an analysis of the experimental biaxial Hopkinson bar technique when such a device consists of a cruciform tensile specimen surrounded by four very long elastic bars. Unlike commonly applied by-pass analysis which attempts to draw conclusions from behavior of elastic bars we attempt to take into account real plastic waves inside the specimen with few hundreds of reflections. A quasi rate-independent as well as a more general rate-dependent tensor function model for ASME 537 steel are applied. Plastic wave speeds non-existent in traditional elasto-viscoplasticity are analyzed. Some preliminary numerical results for symmetric and non-symmetric loading cases valid for initial and subsequent elastic ranges are given.
%K 2D Hopkinson bar
%K cruciform specimen
%K quasi rate independent materials
%U http://www.doiserbia.nb.rs/img/doi/1450-5584/2011/1450-55841101047M.pdf