Numéro |
J. Phys. IV France
Volume 134, August 2006
EURODYMAT 2006 - 8th International Conference on Mechanical and Physical Behaviour of Materials under Dynamic Loading
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Page(s) | 81 - 86 | |
DOI | https://doi.org/10.1051/jp4:2006134014 | |
Publié en ligne | 26 juillet 2006 |
J. Cirne, R. Dormeval, et al.
J. Phys. IV France 134 (2006) 81-86
DOI: 10.1051/jp4:2006134014
Strain-rate effects on the texture evolution of low-symmetry metals: Modeling and validation using the Taylor cylinder impact test
B. Plunkett1, 2, O. Cazacu2 and R.A. Lebensohn31 Air Force Research Laboratory, Munitions Directorate, Eglin AFB, FL 32542, USA
2 Department of Mechanical and Aerospace Engineering, University of Florida/REEF, Shalimar, FL 32579-1163, USA
3 Los Alamos National Laboratory, MST8, MS G755, Los Alamos, NM 87545, USA
Published online: 26 July 2006
Abstract
In this paper, a model for describing the influence of
evolving texture on the response of pre-textured metals for dynamic loading
conditions is proposed. Yielding is described using a recently developed
criterion which captures simultaneously anisotropy and compression-tension
asymmetry associated with deformation twinning. The anisotropy coefficients
as well as the size of the elastic domain are considered to be functions of
the accumulated plastic strain. The specific expressions for the evolution
laws are determined based on experimental data and numerical test results
performed with a self-consistent viscoplastic model together with a
macroscopic scale interpolation technique. An overstress approach is used to
incorporate rate effects in the formulation. Application of the model to the
description of the high-strain rate response of low-symmetry (clock-rolled
hexagonal-closed-packed zirconium) is presented. The very good agreement
between the simulated and experimental post-test geometries of the Taylor
impact specimens in terms of major and minor side profiles and
impact-interface footprints shows the ability of the model to describe the
evolution of anisotropy as a function of the strain rate.
© EDP Sciences 2006