Ultrasound & Materials

Since 2011, studies carried out within the Ultrasounds-Materials (UM) team focus on Quantitative and Non-Destructive Evaluation of materials and structures. This concerns composite materials as well as bonded joints and complex structures, including multilayered plates or cylinders. The developed methods are based on various experimental set-up, using: standard piezoelectric or air-coupled ultrasonic transducers, 3D laser vibrometer, phased arrays, EMATs… The investigated frequency range runs from about 10 kHz to 20 MHz, thus allowing materials to be inspected from meso to macro scales. If most of our techniques assume linear wave propagation, non-linear acoustic phenomena are both numerically and experimentally explored. More recently, part of our activities has been dedicated to ultrasonic imaging of material discontinuities, for applications to defect or damage detection in real structures. The topological technique or synthetic focusing method are examples of used imaging methods. All these methods developed in the QNDE domain require to solve inverse problems. This can be successful if fundamental research on propagation and scattering of ultrasonic waves in complex media is previously achieved. These works are most of the time motivated by industrial needs in the following areas: aeronautics, aerospace, transport, energy, civil-engineering…

Mise à jour le 13/07/2020