VIBRATION-BASED DELAMINATION DETECTION IN COMPOSITE BEAMS BASED ON NONLINEAR SIGNAL ANALYSIS

This study addresses the question for delamination detection in composite laminate beams. A vibration-based approach towards the problem is adopted. This work proposes a novel concept for delamination monitoring in composites based on a nonlinear signal correlation. Experiments are performed on undamaged and delaminated beam and their free decay response is used. The dynamic response is registered by an accelerometer in two different points to use the correlation between the two signals as a metric for delamination identification. Experiments show that the proposed method accurately detects and localizes delamination in a carbon fiber composite beam.