Molecular dynamics study on nanoscale void collapse in single crystal aluminum under 1D and 3D compressions

The nanoscale void collapse in single crystal aluminum under 1D and 3D compressions at extremely high strain rate was investigated by molecular dynamics. Our simulations reveal the formation of two intersecting tetrahedrons around the void under 3D compression, rather than the shear dislocation loops under 1D compression. The formed tetrahedrons prevent the continuous growth of the shear dislocation loops, which therefore makes the void collapse...