EN FR
EN FR


Section: New Results

Plastic impact of iron on aluminium

A new model for plasticity has been developed this year. An iron projectile is impacting an aluminium plate immersed in air. The initial horizontal velocity of the iron is 1000m.s-1. The computation is performed on a 2000×1600 mesh with 144 processors. Homogeneous Neumann conditions are imposed on the left and right borders and embedded on the top and bottom.

The results are presented in Fig 6 with a schlieren image (bottom) and the von Mises criteria (top) at different time steps. A log scale is used and the minimum value is fixed to 109. We can see that the plate is strongly deformed and form at the end a filament. The projectile is flattened but not as much as in the literature because the yield plastic limit is higher. We see a longitudinal wave propagating in the plate followed by a shear wave that causes the plasticity of the material.

Figure 6. Impact of Iron on Aluminium TC2. Schlieren image and von Mises criteria at t=0.03ms, 0.06ms, 0.13ms, 0.26ms, 0.53ms and t=1.04ms from left to right, top to bottom
IMG/movie0005.png IMG/movie0010.png
IMG/movie0024.png IMG/movie0048.png
IMG/movie0096.png IMG/movie0189.png