  We carried out fully atomistic reactive molecular dynamics simulations to
study the mechanical behavior of six newly proposed hybrid schwarzite-based
structures (interlocked petal-schwarzites). Schwarzites are carbon crystalline
nanostructures with negative Gaussian curvature created by mapping a TPMS
(Triply Periodic Minimal Surface) with carbon rings containing six to eight
atoms. Our simulations have shown that petal-schwarzite structures can
withstand uni-axial compressive stress up to the order of GPa and can be
compressed past 50 percent strain without structural collapse. Our most
resistant hierarchical structure has a calculated compressive strength of
260~GPa and specific energy absorption (SEA) of 45.95 MJ/kg, while possessing a
mass density of only 685 kg/m$^3$. These results show that these structures
could be excellent lightweight materials for applications that require
mechanical energy absorption.
