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Delamination monitoring by the local velocimetry based on the spatio-temporal gradient analysis

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2 Author(s)
Teramoto, K. ; Dept. of Mech. Eng., Saga Univ., Japan ; Tsuruta, K.

In this paper, a novel method of local phase velocimetry based on the spatio-temporal gradient analysis is proposed. The proposed method has an ability to measure the local phase velocity of the zero/sup th/ order anti-symmetric Lamb wave field through the linearity among following four components: a vertical displacement, its vertical velocity, and a pair of out-of-plane shearing strains of the surface. In this study, the computational process in the Lamb wave field near the defects is discussed and their physical meanings are investigated through FDTD-simulations.

Published in:

SICE 2003 Annual Conference  (Volume:2 )

Date of Conference:

4-6 Aug. 2003