Modelling the deformation of a high-hardness armour steel in Taylor rod-on-anvil experiments

Ryan, Shannon, McDonald, B, Scott, N, Bigger, R and Chocron, S 2020, Modelling the deformation of a high-hardness armour steel in Taylor rod-on-anvil experiments, in HVIS 2019 : Proceedings of the 15th Hypervelocity Impact Symposium, American Society of Mechanical Engineers, New York, N.Y., pp. 432-439, doi: 10.1115/HVIS2019-040.

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Title Modelling the deformation of a high-hardness armour steel in Taylor rod-on-anvil experiments
Author(s) Ryan, Shannon
McDonald, B
Scott, N
Bigger, R
Chocron, S
Conference name Hypervelocity Impact. Symposium (2019 : 15th : Destin, Florida)
Conference location Destin, Florida
Conference dates 14-19 Apr. 2019
Title of proceedings HVIS 2019 : Proceedings of the 15th Hypervelocity Impact Symposium
Publication date 2020
Start page 432
End page 439
Total pages 8
Publisher American Society of Mechanical Engineers
Place of publication New York, N.Y.
Summary Abstract A high hardness armour steel (HHA) has been subjected to mechanical characterization under tension, compression, and shear loading at quasi-static and dynamic rates incorporating ambient and elevated temperatures. The resulting data has been used to derive constants for four plasticity constitutive models: Johnson-Cook (JC), Zerilli-Armstrong (ZA), modified Johnson-Cook (MJC), and a generalized J2-J3 yield surface (GYS). The resulting models have been used to predict the response of the HHA material during Taylor rod-on-anvil experiments. High speed photography and digital image correlation was used during the rod-on-anvil experiments to capture both transient deformation profiles and maximum principal strain along the surface of the rod (i.e. compression along the length of the rod). The JC, MJC, and GYS models were found to provide the best prediction of the shape of the rod (nose diameter and length), within 2% of the experimental measurement in all four rod-on-anvil experiments which did not result in fracture. The JC and GYS models, furthermore, were found to provide the best agreement with the measured transient surface strain profiles, predicting the experimental measurement to within 10% at all measurement locations and time steps for the experiment resulting in maximum deformation (impact velocity = 208 m/s). The results suggest that the added complexity of models such as the MJC and GYS, which incorporate strain hardening saturation, two-part strain rate dependency, and J3 plasticity effects, are unnecessary for HHA under the loading conditions experienced during rod-on-anvil experiments.
ISBN 9780791883556
Language eng
DOI 10.1115/HVIS2019-040
Indigenous content off
HERDC Research category E1 Full written paper - refereed
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Document type: Conference Paper
Collection: A2I2 (Applied Artificial Intelligence Institute)
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