Evaluation of matrix cracking in composite laminates based on anomaly indices

A Holistic Approach to Structural Health Monitoring of Composite Aerospace Structures using Lamb Waves: From Manufacturing to Service

“…Guy et al [71] created a damage index using the frequency spectrum, this damage index was applied to a selected time window based on predicted signal arrival times. Matrix cracking was studied by Liu et al [72] using a recursive plot and a variety of nonlinear time series characteristics.…”