Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Compaction Dynamics Of Metallic Nano-Foams   We investigate, by molecular dynamics simulation, the generic features
associated with the dynamic compaction of metallic nano-foams at very high
strain rates. A universal feature of the dynamic compaction process is revealed
as composed of two distinct regions: a growing crushed region and a leading
fluid precursor. The crushed region has a density lower than the solid material
and gradually grows thicker in time by "snowplowing." The trapped fluid
precursor is created by ablation and/or melting of the foam filaments and the
subsequent confinement of the hot atoms in a region comparable to the filament
length of the foam. Quantitative characterization of nano-foam compaction
dynamics is presented and the compacted form equation-of-state is discussed. We
argue that high-energy foam crushing is not a shock phenomenon even though both
share the snowplow feature.

11
The categories of this paper are: hep-lat
12
The categories of this paper are: nucl-th
19
The categories of this paper are: eess
18
The categories of this paper are: econ
33
The categories of this paper are: plasm-ph
0
The categories of this paper are: hep-ph
7
The categories of this paper are: hep-th
6
The categories of this paper are: astro-ph
35
The categories of this paper are: mtrl-th
10
The categories of this paper are: q-bio
14
The categories of this paper are: math-ph
9
The categories of this paper are: nlin
15
The categories of this paper are: nucl-ex
2
The categories of this paper are: math
36
The categories of this paper are: cmp-lg
21
The categories of this paper are: adap-org