Shock compression and spallation of single crystal tantalum
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1.
California Institute of Technology
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2.
The University of Texas at El Paso
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3.
Los Alamos National Laboratory
- Other:
- Elert, Mark L.
Abstract
We present molecular dynamics simulations of shock-induced plasticity and spall damage in single crystal Ta described by a recently developed embedded-atom-method (EAM) potential and a volumedependent qEAM potential. We use impact or Hugoniotstat simulations to investigate the Hugoniots, deformation and spallation. Both EAM and qEAM are accurate in predicting, e.g., the Hugoniots and γ - surfaces. Deformation and spall damage are anisotropic for Ta single crystals. Our preliminary results show that twinning is dominant for [100] and [110] shock loading, and dislocation, for [111]. Spallation initiates with void nucleation at defective sites from remnant compressional deformation or tensile plasticity. Spall strength decreases with increasing shock strength, while its rate dependence remains to be explored.
Additional Information
© 2012 American Institute of Physics. We benefited from discussions with Y. Z. Tang. This work was supported by the LDRD and ASC programs at LANL, and the PSAAP project at Caltech.Attached Files
Published - APC001259.pdf
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Additional details
- Eprint ID
- 30025
- Resolver ID
- CaltechAUTHORS:20120409-072731815
- Los Alamos National Laboratory (LANL)
- Department of Energy (DOE)
- Created
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2012-04-10Created from EPrint's datestamp field
- Updated
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2021-11-09Created from EPrint's last_modified field
- Series Name
- AIP Conference Proceedings
- Series Volume or Issue Number
- 1426