Fig. 6: Effect of the number of self-folded layers on the mechanical behaviors of SFGMs.

a Stress–strain curves of SFGMs (n = 1, 3, and 5). b Tensile strength and fracture strain of SFGMs from simulation (points) and prediction (lines).
a Stress–strain curves of SFGMs (n = 1, 3, and 5). b Tensile strength and fracture strain of SFGMs from simulation (points) and prediction (lines).