Ultrasonic imaging of materials and biological matter – Spatial control of sound propagation with metamaterials
Department presentation and research
The APY department's research concerns the propagation of ultrasound over a very broad spectrum of frequencies, characteristic sizes, and types of support media. The main fields of application are the control and health monitoring of industrial materials and structures (materials and assembly in the transport and energy sectors), as well as quantitative ultrasonic imaging of living matter (single biological objects). APY also develops acoustic metamaterials for the spatial control of sound in dense media via extreme acoustic properties (ultra absorption, focusing).
A general approach of the team is to understand the processes of wave-matter interactions associated with the development of advanced experimental techniques. These activities combining propagation theory, numerical simulations and experimental physics allow the creation of inverse problems giving access to new quantitative information on the local mechanical properties of the inspected media (elasticity, anisotropy, adhesion, defects), as well as the design and making of new functional composites for acoustics.
Most of these activities are approached from the point of view of multidisciplinarity in partnership with laboratories in the fields of biology, physico-chemistry and applied mathematics. This fundamental research extends into the societal world through direct contracts or partnership actions with research centers of major industrial groups.
APY activities are grouped around 3 teams (Research Operation):
- GT1 – Ultrasound-Materials (UM) focuses on Non-Destructive Evaluation (NDE) of composites, Health Monitoring of bounded structures (SHM), Non Destructive Testing (NDT) and defaults imaging (cracks, holes, delaminations). UM develops air-borne ultrasonics, non-linear ultrasonic techniques and thermo-acoustic techniques for a frequency range about the MHz.
- GT2 – Opto-Acoustics (OA) focuses on nano-transduction and imaging at very small scales (10 µm - 100 nm) by ultra-high frequency ultrasounds (GHz-sub-THz) generated and detected by optical methods.
- GT3 – Functional Materials for Acoustics (FAMAS) focuses on propagation in artificial composite media (periodic, random, locally resonant, spatially graded), for the design and making of metamaterials with functions of spatial field-control for ultrasonic instrumentation and stealth in underwater acoustics.
Responsable de Dpt
Université de Bordeaux
351 Cours de la Libération
33405 TALENCE CEDEX
05 40 00 21 91
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