TY - JOUR
T1 - Goodness dispersion curves for ultrasonic guided wave based SHM
T2 - A sample problem in corrosion monitoring
AU - Gao, H.
AU - Rose, J. L.
N1 - Funding Information:
Acknowledgements. I am grateful to Dr. L. Javois, University of California at Irvine, for the kind gift of the CP8 antibody. I wish to thank M. Stohr, DFKZ, Heidelberg, for letting us use the fluo- rescence microscope photometer, Dr. S. Hoffmeister for helpful comments, and C. Schaller, in which laboratory the experiments were done. This work was supported by the DFG (SFB 317), by the Bundesministerium fiir Forschung und Technologie (BCT 365/1), and by the Fonds der Deutschen Chemischen Industrie.
PY - 2010/1
Y1 - 2010/1
N2 - Ultrasonic guided wave techniques have great potential for structural health monitoring applications. Appropriate mode and frequency selection is the basis for achieving optimised damage monitoring performance. In this paper, several important guided wave mode attributes are introduced in addition to the commonly used phase velocity and group velocity dispersion curves while using the general corrosion problem as an example. We first derive a simple and generic wave excitability function based on the theory of normal mode expansion and the reciprocity theorem. A sensitivity dispersion curve is formulated based on the group velocity dispersion curve. Both excitability and sensitivity dispersion curves are verified with finite element simulations. Finally, a goodness dispersion curve concept is introduced to evaluate the tradeoffs between multiple mode selection objectives based on the wave velocity, excitability and sensitivity.
AB - Ultrasonic guided wave techniques have great potential for structural health monitoring applications. Appropriate mode and frequency selection is the basis for achieving optimised damage monitoring performance. In this paper, several important guided wave mode attributes are introduced in addition to the commonly used phase velocity and group velocity dispersion curves while using the general corrosion problem as an example. We first derive a simple and generic wave excitability function based on the theory of normal mode expansion and the reciprocity theorem. A sensitivity dispersion curve is formulated based on the group velocity dispersion curve. Both excitability and sensitivity dispersion curves are verified with finite element simulations. Finally, a goodness dispersion curve concept is introduced to evaluate the tradeoffs between multiple mode selection objectives based on the wave velocity, excitability and sensitivity.
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U2 - 10.1017/S0001924000003523
DO - 10.1017/S0001924000003523
M3 - Article
AN - SCOPUS:77649206025
SN - 0001-9240
VL - 114
SP - 49
EP - 56
JO - Aeronautical Journal
JF - Aeronautical Journal
IS - 1151
ER -