Assessing stiffness degradation of stiffened composite panels in post-buckling compression-compression fatigue using guided waves

The application of structural health monitoring (SHM) in composite airframe elements under long-term realistic fatigue loading needs to consider the behavior on global level, which is an intricate task. overall stiffness a key design parameter for structures and degradation closely related damage accumulation failure mechanism can be used as indicator degradation. Therefore, this paper investigates use guided waves axial estimation stiffened carbon fiber reinforced polymer (CFRP) panels post-buckling compression-compression (C-C) loads. Impacted or artificially debonded are tested until acquired using network piezoelectric (PZT) sensors at fixed cycle intervals. wave phase velocity along direction extracted estimate with consideration mode conversion PZT sensors. estimated five matches well calculated from load–displacement curves. also assessed prognostic performance metrics shows good potential being purposes.