  Schwarzites are 3D crystalline porous materials exhibiting the shape of
Triply Periodic Minimal Surfaces (TPMS). They possess negative Gaussian
curvature, created by the presence of rings with more than six sp2-hybridized
carbon atoms. Recently, new routes to their synthesis have been proposed. Due
to its foam-like structure, schwarzites are interesting for mechanical energy
absorption applications. In this work, we investigate through fully atomistic
reactive molecular dynamics the mechanical response under ballistic impacts of
four structures from primitive (P) and gyroid (G) families (two structures
within each family). The two structures in the same family differ mainly by the
ratio of hexagons to octagons, where this ratio increases the 'flatness' of the
structures. Although the penetration depth values are higher in the 'flatter'
structures (P8bal and G8bal), the absorbed kinetic energy by them is
considerably higher, which yields them a better energy-absorption performance.
