Abstract：
:This paper establishes a model evaluating the signal loss of double transmitted acoustic beams through random rough liquid-solid surfaces based on Fresnel approximation and the phase-screen approximation. The numerical solution is replaced with a simple analytical solution through using the exponential substitution approach to remove the nonlinear integral terms. Therefore, the real-time inspection by using C-scan imaging systems of flaws in materials can be achieved through the proposed model. The research results show that the signal loss of double transmissions from random rough surfaces mainly depends on two factors: the root-mean-square (RMS) of the roughness and the depth of the flaw in materials. The experimentally measured signal loss is in good agreement with the theoretical predictions. The evaluation of the signal loss can be useful for improving the accuracy and reliability of the non-destructive testing (NDT).
journal_name
Ultrasonicsjournal_title
Ultrasonicsauthors
Chen Z,Yang Ldoi
10.1016/j.ultras.2010.05.007subject
Has Abstractpub_date
2011-01-01 00:00:00pages
49-56issue
1eissn
0041-624Xissn
1874-9968pii
S0041-624X(10)00086-7journal_volume
51pub_type
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