Characterization of impact damage in cfrps using a scanning acoustic microscope

摘要

This paper describes the quantitative technique using scanning acoustic microscopy (SAM) for characterizing the low energy impact delamination at individual laminar interfaces of carbon fibre/modified bismalemide laminated composites. Accurateinformation on the damaged states, such as size and shape of delaminations through-the-thickness distribution, can be obtained using three kinds of ultrasonic techniques in reflection mode, namely ply-by-ply scanning, time-of-flight and B-scan analysis. Good correlation is found between the results obtained from fractography and SAM experiments. As a rapid, non-destructive inspection tool, SAM is also a powerful technique to characterize the micro-deformation and damage propagation mechanisms in thecompression after impact (CAI) test specimens.