Amortized Posteriors for Estimation of Material Constitutive Parameters from Multimodal Measurements on Small Punch Tests
This paper presents an amortized, likelihood-free framework combining Gaussian process surrogates and Conditional Flow Matching to efficiently estimate material constitutive parameters from multimodal Small Punch Test data, demonstrating that integrating Digital Image Correlation fields with force-displacement curves significantly improves posterior precision compared to using global response data alone.