Extended Data Fig. 7: A variety of designs proposed by the diffusion model for a given target response with negative stiffness (buckling).
From: Inverse design of nonlinear mechanical metamaterials via video denoising diffusion models
We plot the effective stress response σeff. of the original design of the target response (‘Ground truth’) presented in Fig. 3d with three synthesized designs from the diffusion model (‘Pred. 1-3’; NRMSE with respect to the target response in brackets). We also provide the FE evaluation of the original and generated designs in terms of the full-field σ22-distribution (indicated in MPa in the Eulerian frame) and the corresponding relative L2-errors of the predicted σ22-distribution, where applicable. Note that for Pred. 1 and Pred. 2 the predicted deformation buckles in the opposite direction of the FE evaluation (leading to seemingly high errors).
