Non Shock Dynamic Compression of Tantalum
DOI:
https://doi.org/10.14738/aivp.93.10500Abstract
We start by simulating the response of tantalum to dynamic non-shock loading using a standard hydrocode, and the results we get are not consistent with test data. Standard hydrocodes use what we call the flowstress approach to describe the dynamic viscoplastic response of materials. We therefore transform our hydrocode to use what we call the overstress approach to dynamic viscoplastic response. It turns out that using the overstress approach makes the hydrocode more successful in reproducing non-shock dynamic compression test data.
References
J.R. Assay et al, Yield strength of tantalum under ramp compression to 18 GPa, J. Appl. Phys. 106, 073515 (2014).
J.L. Brown et al., Flow strength of tantalum under ramp compression to 250 GPa, J. Appl, Phys. 115, 043530 (2014).
Y. Partom, Modeling stress upturn at high strain rates for ductile materials, DYMAT 2018, Arcachon France (2018).
J.K. Roberts and A.R. Miller, Heat and thermodynamics vol. 4, Interscience publishers (1954).
D.J. Steinberg, Equation of state and strength parameters of selected materials, LLNL, UCRL-MA-106439 (1996).
Y. Partom, Change of shear modulus and yield stress with pressure and temperature, SCCM (2015).
Y. Partom, Overstress and flowstress approaches to dynamic plasticity, DYMAT 2015, Lugano Switzerland (2015).
M.I. Wilkins, Calculation of elastic-plastic flow, Calif. Univ. Livermore Radiation Lab. (1963).
Downloads
Published
How to Cite
Issue
Section
License
Copyright (c) 2021 Yehuda Partom
This work is licensed under a Creative Commons Attribution 4.0 International License.
