Presentation of the project

The design of lightweight and stiff panels with high vibration damping properties is an important issue in mechanical engineering (aeronautics, aerospace for example).

Composite and architected materials are a response to this problem. The insertion of acoustic black holes, or traps for flexural waves based on a local heterogeneity of the stiffness and damping is an innovative technique for passive structural vibration damping without added mass.

The goal of the project is to push the current limitations of this existing strategy by developing "enhanced acoustic black holes" absorbers based on the integration of piezoelectric and thermal active systems, leading to architectured panels combining 4 complementary effects: absorption using geometric acoustic black hole, active control of the stiffness, thermal control of the damping, stop band effect induced by the periodicity of the medium.