Acoustic seminar | 10 September 2025

The report presents the main results and achievements obtained during the research experience. The first part investigates acoustic emission signal parameter analysis of polymer composite materials, beginning with basic statistical distribution of descriptors and progressing to clustering analysis and pattern dynamics. As a result, the destruction process of fiberglass reinforced plastics is comprehensively described with stages.
The second part describes the collaborative research on the fiber-optic sensors integrated into the polymer material structure. The work includes the application of a Mach-Zehnder interferometer for acoustic emission detection, as well as the use of machine learning techniques for Specklegram analysis to predict small deformation.
The final part summarizes the personal project of the researcher on Guided Waves in honeycomb sandwiches structures. The research focuses on adapting of sandwich configuration to classical layered models, including analytical and experimental group velocity analysis, evaluation of effective elastic properties for homogenization, longitudinal wave velocity assessment, and surface layer dispersion curves characterization. Overall, the results contribute to advancing Non-Destructive Testing approaches for complex composite structure.