Multifeature optimization of guided wave modes for structural health monitoring of composites

Huidong Gao, Joseph Lawrence Rose

Research output: Contribution to specialist publicationArticle

6 Scopus citations

Abstract

Research on guided waves clearly indicates that proper wave mode selection is the key to successful damage detection in a structure. In trying to explore the ultimate capability of guided waves, this paper is aimed at finding those modes with optimized performance from an infinite number of mode possibilities. Our optimization procedure is based on a solid foundation of the physical analysis of guided wave propagation, excitation and sensing mechanics. A suite of features are defined for guided wave modes in a quantitative manner: for example, the wave excitability, attenuation rate, dispersion and sensitivity. For laminated composites in particular, the phenomenon of guided wave skewing is also studied. Some state of the art numerical techniques and new understanding concerning these guided wave mode features are also discussed in this paper. A multifeature optimization framework is then introduced to comprehensively test the tradeoffs in mode selection. The problem of delamination monitoring in a 16 layer quasi-isotropic composite laminate is used in the paper as an example. Recommendations on the wave mode selection procedures are provided after the heuristic and rational optimization process.

Original languageEnglish (US)
Pages1035-1041
Number of pages7
Volume65
No10
Specialist publicationMaterials Evaluation
StatePublished - Oct 1 2007

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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