Characterization and modeling of ultrasonic structural noise in the multiple scattering regime

Abstract : Multiple scattering can occur when performing ultrasonic measurements on highly scattering materials such as coarse grain steel or concrete. It constitutes in general a limiting factor for NDE techniques. In this communication, a method to simulate the structural noise due to multiple scattering is described. It requires three parameters: the diffusion constant, the elastic mean free path and the correlation distance. A method to obtain these parameters based on a single measurement procedure is presented. This approach has been applied to samples of coarse grain steel. The backscattered noise has been calculated for different probes and compared to experimental signals.
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Conference papers
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https://hal-cea.archives-ouvertes.fr/cea-01828194
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Submitted on : Tuesday, July 3, 2018 - 9:36:15 AM
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T. Bedetti, V. Dorval, F. Jenson, A. Derode. Characterization and modeling of ultrasonic structural noise in the multiple scattering regime. 39th Annual Review of Progress in Quantative Nondestructive Evaluation (QNDE), Jul 2012, Denver, United States. pp.1158-1165, ⟨10.1063/1.4789174⟩. ⟨cea-01828194⟩

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