%0 Computer Program
%A Thakolkaran, Prakash
%A Espinal, Michael
%A Dhulipala, Somayajulu
%A Kumar, Siddhant
%A Portela, Carlos M.
%D 2024
%T Data and Code underlying publication: Experiment-informed finite-strain inverse design of spinodal metamaterials
%U 
%R 10.4121/bdc2b8d2-d000-4f56-ab0e-e64a147220fd.v1
%K Spinodal metamaterials
%K Machine learning
%K Nonlinear properties
%K Inverse design
%K In situ characterization
%X <p>Spinodal metamaterials, with architectures inspired by natural phase-separation processes, have presented a significant alternative to periodic and symmetric morphologies when designing mechanical metamaterials with extreme performance. While their elastic mechanical properties have been systematically determined, their large-deformation, nonlinear responses have been challenging to predict and design, in part due to limited data sets and the need for complex nonlinear simulations. This work presents a novel physics-enhanced machine learning (ML) and optimization framework tailored to address the challenges of designing intricate spinodal metamaterials with customized mechanical properties in large-deformation scenarios where computational modeling is restrictive and experimental data is sparse. By utilizing large-deformation experimental data directly, this approach facilitates the inverse design of spinodal structures with precise finite-strain mechanical responses. The framework sheds light on instability-induced pattern formation in spinodal metamaterials—observed experimentally and in selected nonlinear simulations—leveraging physics-based inductive biases in the form of nonconvex energetic potentials. Altogether, this combined ML, experimental, and computational effort provides a route for efficient and accurate design of complex spinodal metamaterials for large-deformation scenarios where energy absorption and prediction of nonlinear failure mechanisms is essential.</p>
%I 4TU.ResearchData