Instrumented Taylor Anvil-on-Rod Impact Test for validating applicability of standard strength models to transient deformation states
File(s)
Published version
Author(s)
Eakins, DE
Thadhani, NN
Type
Journal Article
Abstract
Instrumented Taylor anvil-on-rod impact tests have been conducted on oxygen-free electronic copper to validate the accuracy of current strength models for predicting transient states during dynamic deformation events. The experiments coupled the use of high-speed digital photography to record the transient deformation states and laser interferometry to monitor the sample back (free surface)velocity as a measure of the elastic∕plastic wave propagation through the sample length. Numerical continuum dynamics simulations of the impact and plastic wave propagation employing the Johnson-Cook [Proceedings of the Seventh International Symposium on Ballistics, 1983, The Netherlands (Am. Def. Prep. Assoc. (ADPA)), pp. 541–547], Zerilli-Armstrong [J. Appl. Phys. C1, 1816 (1987)], and Steinberg-Guinan [J. Appl. Phys. 51, 1498 (1980)]constitutive equations were used to generate transient deformation profiles and the free surfacevelocity traces. While these simulations showed good correlation with the measuredfree surfacevelocity traces and the final deformed sample shape, varying degrees of deviations were observed between the photographed and calculated specimen profiles at intermediate deformation states. The results illustrate the usefulness of the instrumented Taylor anvil-on-rod impact technique for validating constitutive equations that can describe the path-dependent deformation response and can therefore predict the transient and final deformation states.
Date Issued
2006-10-03
Date Acceptance
2006-07-20
Citation
Journal of Applied Physics, 2006, 100
ISSN
1089-7550
Publisher
American Institute of Physics (AIP)
Journal / Book Title
Journal of Applied Physics
Volume
100
Copyright Statement
Copyright © 2006 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in 'Instrumented Taylor Anvil-on-Rod Impact Test for validating applicability of standard strength models to transient deformation states' D. E. Eakins and N. N. Thadhani J. Appl. Phys. 100, 073503 (2006) and may be found at https://dx.doi.org/10.1063/1.2354326
Publication Status
Published
Article Number
073503