“…Model experiments on PMMA are performed under predominant mode I loading conditions leading to stable crack propagation, where heterogeneous crack fronts generate high density of AE emissions with localized dynamic instabilities, that are leading to high amplitude AE responses. Compared with proper pure mode I experiments as a baseline and unstable alternate (stick-slip) cracking (previously investigated in (Heinzmann et al, 2023)), the paper discusses the complexity around the ability of correlating AE to local fracture regimes.…”