Date of download: 10/20/2017 Copyright © ASME. All rights reserved. From: Frequency-Steered Acoustic Arrays: Application to Structural Health Monitoring of Composite Plates J. Eng. Mater. Technol. 2010;133(1):011003-011003-6. doi:10.1115/1.4002638 Figure Legend: Composite panel dispersion relations at ωh/cT=4: A0 solid line, SH0 dashed line, and S0 dotted line. (a) Glass fiber S2 [08] lay-up sequence, (b) carbon fiber/epoxy T700/SE84HT [02/+902] lay-up sequence, and (c) graphite/epoxy AS4/3502 [+456/−456]S lay-up sequence.