The research idea of the method is based on the statement that internal structural damage locally affects the surface displacement and strain field, also results changes in the Lamb waves parameters. It can happen that different damages can cause a similar response, therefore multiple techniques and parameters are selected (displacement and strain fields under different static loading cases, Lamb waves parameters) to identify the damage. Static mechanical tests of coupons will be used for materials and damage models calibration. Experimental data in conjunction with the calibrated materials and damage models will be used with finite element model updating technique to identify the damage in composite laminate plates with larger dimensions. Fatigue testing of damaged and thermally healed specimens using the 3D-Digital Image Correlation system and verification by X-ray tomography will provide an information on damage accumulation and stiffness degradation of intact, damaged, and healed specimens. Peridynamics model calibrated by the results of fatigue tests will be applied for assessment of structural integrity and prediction of composite structure lifetime.
Project funding:
Projects funded by the Research Council of Lithuania (RCL), Projects carried out by researchers’ teams
Project results:
The aim of the project is the development of a new method for monitoring and assessing the structural integrity of thermoplastic composite structures with thermally induced healing capabilities.
Period of project implementation: 2023-04-13 - 2026-03-31
Project coordinator: Kaunas University of Technology
