Fig. 4: Uniaxial compression experiments and simulations of 3D-printed finite-size lattices.
From: Inverse design of truss lattice materials with superior buckling resistance
a Experimentally tested unit cells. Snapshots of b un-deformed and c deformed (just before failure) 3D-printed samples at ~3.3% applied strain. d Normalized experimental and numerical stress-strain curves for the symmetric-inverse-designed architecture (at two different loading angles), sponge-inspired designs, and typical grid-like structures. The effective stress is normalized by the base material’s Young’s modulus (see the “Materials and methods” section) and relative density. n = 4 samples are tested for the symmetric-inverse-designed architecture (2 for each loading angle), while n = 3 samples for the sponge-inspired-b design. Curves are color-coded according to the unit cells depicted in (a) and (d). Scale bar 20 mm for (b) and (c).
