Issue |
EPJ Web of Conferences
Volume 26, 2012
DYMAT 2012 - 10th International Conference on the Mechanical and Physical Behaviour of Materials under Dynamic Loading
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Article Number | 02004 | |
Number of page(s) | 6 | |
Section | Microstructural Effects | |
DOI | https://doi.org/10.1051/epjconf/20122602004 | |
Published online | 31 August 2012 |
https://doi.org/10.1051/epjconf/20122602004
Influence of sweeping detonation-wave loading on shock hardening and damage evolution during spallation loading in tantalum
Los Alamos National Laboratory, Los Alamos, New Mexico 87544, USA
Widespread research over the past five decades has provided a wealth of experimental data and insight concerning the shock hardening, damage evolution, and the spallation response of materials subjected to square-topped shock-wave loading profiles. However, fewer quantitative studies have been conducted on the effect of direct, in-contact, high explosive (HE)-driven Taylor wave (unsupported shocks) loading on the shock hardening, damage evolution, or spallation response of materials. Systematic studies quantifying the effect of sweeping-detonation wave loading are yet sparser. In this study, the shock hardening and spallation response of Ta is shown to be critically dependent on the peak shock stress and the shock obliquity during sweeping-detonation-wave shock loading. Sweeping-wave loading is observed to: a) yield a lower spall strength than previously documented for 1-D supported-shock-wave loading, b) exhibit increased shock hardening as a function of increasing obliquity, and c) lead to an increased incidence of deformation twin formation with increasing shock obliquity.
© Owned by the authors, published by EDP Sciences, 2012
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