... was initially developed. After a brief introduction, the paper reviews the PWAS-based SHM principles. It follows with a discussion of guided wave propagation in composites and PWAS tuning effects. Then, it discusses damage modes in composites. Finally, the paper presents some experimental results with damage...

... impending failure in composites: It could, in principle, capture and quantify the complex wave propagation problem of dispersion, scattering, and mode conversion across a delamination front, and it will be further investigated. In the current work, contours may start small and are approximately convex...

.... Asatryan , A. A. , Robinson , P. A. , Botten , L. C. , McPhedran , R. C. , Nicorovici , N. A. , and de Sterke , C. M. , 1999 , “ Effects of Disorder on Wave Propagation in Two-Dimensional Photonic Crystals ,” Phys. Rev. E , 60 , pp. 6118 – 6127 . Platts , S. B...