Abstract：
:This paper suggests a method for high-sensitivity damage detection. The method is based on pitch-catch measurements of Lamb waves combined with a baseline subtraction technique in the frequency-wavenumber domain. Small amplitude converted modes, generated during the interaction of propagating waves with damage, can thus be detected with minimal a priori information regarding their expected location in the frequency-wavenumber plane. This method is applied in the present paper to a case of notches with varied depth. Finite element simulations are carried out in the temporal domain to mimic results obtainable in real-world experiments. Two cases are studied, namely when each of the two pure fundamental modes are incident on a notch. The advantages of the method are detailed. The procedure to implement this method is described in the context of Structural Health Monitoring (SHM) or Non-Destructive Testing (NDT).
journal_name
Ultrasonicsjournal_title
Ultrasonicsauthors
McKeon P,Yaacoubi S,Declercq NF,Ramadan S,Yaacoubi WKdoi
10.1016/j.ultras.2013.08.010subject
Has Abstractpub_date
2014-02-01 00:00:00pages
592-603issue
2eissn
0041-624Xissn
1874-9968pii
S0041-624X(13)00232-1journal_volume
54pub_type
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