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SHOCK COMPRESSION AND SPALLATION OF SINGLE CRYSTAL TANTALUM.
SHOCK COMPRESSION AND SPALLATION OF SINGLE CRYSTAL TANTALUM.
- Source :
-
AIP Conference Proceedings . 2012, Vol. 1426 Issue 1, p1259-1262. 4p. 2 Color Photographs, 4 Graphs. - Publication Year :
- 2012
-
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 volume-dependent 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. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 0094243X
- Volume :
- 1426
- Issue :
- 1
- Database :
- Academic Search Index
- Journal :
- AIP Conference Proceedings
- Publication Type :
- Conference
- Accession number :
- 100955460
- Full Text :
- https://doi.org/10.1063/1.3686509