ME Department Seminar: Cédric Bellis

Starts:
1:00 pm on Thursday, May 2, 2013
Location:
RM 245
URL:
http://www.bu.edu/me/files/2013/04/Seminar-S13-Bellis.pdf
Reciprocity identities for quasi-static piezoelectric transducer models:
Application to non-destructive testing -- The focus of this presentation is the transient wave-based identification of defects embedded in elastic solids using piezoelectric transducers. This work addresses this problem within a comprehensive framework encompassing description of elastic wave propagation within the probed media as well as consideration of the coupling phenomena induced by the transducers. The identification problem is investigated by way of a topological sensitivity approach that permits the construction of a defect indicator function based on key reciprocity identities and using optimally focusing excitations. A set of 2D numerical examples based on the spectral finite-elements method is presented to assess the performances of the proposed approach.