Guided wave phased array beam steering in composite plates

Fei Yan, Joseph Lawrence Rose

Research output: Chapter in Book/Report/Conference proceedingConference contribution

47 Scopus citations


Guided wave phased array systems have great potential in structural health monitoring (SHM), especially for aircraft applications due to its capability of steering the emitted guided wave beam to inspect a large area with the sensor array at just one accessible position. However, when the guided wave phased array is applied to composite panels of an aircraft component, the anisotropic behavior of the composite materials leads to a significant influence on the beam steering performance of the phased array. In this study, mode neighborhoods in dispersion curves where guided waves have quasi-isotropic behavior (i.e. constant or similar phase velocities in different wave propagation directions) are explored for unidirectional, cross-ply, and quasi-isotropic composite plates. It was demonstrated that the energy skewness of guided waves was well suppressed in these mode neighborhoods. Furthermore, by utilizing a modified delay-and-sum beam forming algorithm, the guided wave beam of a linear phased array can be steered quite well to the desired directions in a composite plate.

Original languageEnglish (US)
Title of host publicationHealth Monitoring of Structural and Biological Systems 2007
StatePublished - Nov 5 2007
EventHealth Monitoring of Structural and Biological Systems 2007 - San Diego, CA, United States
Duration: Mar 19 2007Mar 22 2007

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X


OtherHealth Monitoring of Structural and Biological Systems 2007
Country/TerritoryUnited States
CitySan Diego, CA

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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