2D and 3D simulations of damage in 5-grain copper gas gun samples
- Los Alamos National Laboratory
2D and 3D Hydrocode simulations were done of a gas gun damage experiment involving a 5 grain sample with a polycrystalline flyer with a velocity of about 140 m/s. The simulations were done with the Flag hydrocode and involved explicit meshing of the 5 grains with a single crystal plasticity model and a pressure based damage model. The calculated fields were compared with two cross sections from the recovered sample. The sample exhibited grain boundary cracks at high angle and tilt grain boundaries in the sample but not at a sigma 3 twin boundary. However, the calculation showed large gradients in stress and strain at only the twin boundary, contrary to expectation. This indicates that the twin boundary is quite strong to resist the predicted high gradients and that the calculation needs the addition of a grain boundary fracture mode. The 2D and 3D simulations were compared.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC52-06NA25396
- OSTI ID:
- 1044893
- Report Number(s):
- LA-UR-10-08361; LA-UR-10-8361; TRN: US201214%%562
- Resource Relation:
- Conference: International Symposium on Plasticity 2011 and Its Current Applications ; January 3, 2011 ; Pureto-Vallarta, Mexico
- Country of Publication:
- United States
- Language:
- English
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