LMA - Laboratoire de Mécanique et d’Acoustique

I. Solodov - Mechanical and acoustical resonances for recognition and imaging of defects


Le 20 septembre 2022 de 11h00 à 12h00

Igor Solodov / Université de Stuttgart

The topics planned to be discussed are as follows :

  • What makes planar defects, like delaminations and cracks, resonant ? Lump and wave models of Local Defect Resonance (LDR).
  • Effect of defect shape : Classical Rayleigh method for LDR fundamental frequencies
  • Case studies of highly-sensitive defect imaging via LDR
  • Nonlinear LDR modes : Superharmonic, combination frequency and parametric LDR
  • Case studies of defect-selective low-power nonlinear defect imaging
  • Resonant Acoustic Emission (RACE) by defects : Simulation and validation
  • RACE for ”listening” of defects : Scanning, robotic and full-field imaging modes.

References :
[1] I. Solodov, Nonlinear acoustic response of damage applied for diagnostic Imaging, In : Nonlinear ultrasonic and vibro-acoustical techniques for non-destructive evaluation, Ed. T. Kundu, (2019), Chapter 8, Springer, Switzerland
[2] I. Solodov, Nonlinear acoustic measurements for NDE applications : Waves versus vibrations, In : Measurement of Nonlinear Ultrasonic Characteristics, Ed. K.-Y. Jhang et al., (2020), Chapter 4, Springer Nature Singapore Pte Ltd.

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