Shock Loading

The following links contain video files, which may require a moment to load:

• MV1: 1.2 km/s [100] Shock. 1.2 km/s impact of a [100]-oriented copper single-crystal nanofilm. Atoms are colored according to their centro-symmetry parameter. A large density of highly ordered stacking faults are observed to nucleate at the shock front. This plasticity is completely reversed as the rarefaction wave travels back into the crystal.

• MV2: 1.2 km/s [100] Stress profile. Stress profile in a 1.2 km/s impacted, [100]-oriented copper single-crystal nanofilm. A highly planar plastic shock front is observed.

• MV3: 1.2 km/s, [111] Shock. 1.2 km/s impact of a [111]-oriented copper single-crystal nanofilm. Atoms are colored according to their centro-symmetry parameter. The shocked region consists of a lower density of short, disordered stacking faults. In this case, as the rarefaction wave travels back into the crystal, the plasticity is not fully recovered.

• MV4: 1.2 km/s [111] Stress profile. Stress profile in a 1.2 km/s impacted, [111]-oriented copper single-crystal nanofilm. The shock front is characterized by a fast leading elastic wave and a trailing plastic wave.

• MV5: [100] vs. [111] Spallation. Spallation of a [100] (top), and [111] (bottom) oriented copper single-crystal nanofilm. Only defective atoms are shown here.

• MV6: [111] Void Nucleation. Nucleation of voids at the spall plane of a [111]-oriented copper single-crystal nanofilm. Atoms are colored according to their centro-symmetry parameter. Void nucleation is found to occur at locations of high tensile stress on stacking faults.