Table 2.

Summary of the lightweight architectures and the corresponding group number.

Group #	Lightweight Architecture
1	Octet Microlattice (this study)
2	Kelvin Microlattice (this study)
3	Cubic Microlattice (this study)
4	Commercial Cubic Microlattice
5	Titanium Octet Trussα
6	Rigid Polyurethane Foamβ
7	Aluminum Foamγ
8	Commercial Polyurethane Foamδ
9	Ceramic Composite Microlattice A
10	First Order Octet Microlattice (this study)
11	Second Order Octet Microlattice (this study)

^αThe apparent density of the Ti octet lattice was calculated by assuming that the density of the bulk metal alloy (Ti-6Al-4V) is 4.43 g/cm³.

^βThe compressive strength of the rigid polyurethane foam is estimated based on a reported plot.

^γThe compressive strength of the aluminum foam is estimated based on a reported plot of compressive strength vs. relative density, and the density of the foam is estimated by assuming the bulk density of the metal alloy is 2.7 g/cm³.

^δThe compressive strength of the commercial polyurethane foam is the reported mean yield strength.