Damage indices evaluation for one-dimensional guided wave-based structural health monitoring

Damage detection in structures and systems is essential for monitoring parameters that can affect their integrity. This paper evaluates the efficiency of four damage indices (DIs) commonly used with temporal wave signals. The root mean square deviation, absolute percentage covariance, correlation coefficient deviation DIs are presented, a normalization then proposed. An Euler-Bernoulli beam as guided modelled spectral element method excited by toneburst signal. It includes theoretical background throw-off beam, undamaged cracked elements. single crack position map varying depth positions calculated deterministic random signal responses derived from noise addition. Results showed could identify quantify conditioned to pulse location point influence estimation, which leads an analysis comparable practical applications.