Electro-Mechanical Material Systems
The Electromechanical Materials Systems group investigates the development and use of electromechanical coupling in adaptive structures.
We are interested in the direct electrostatic coupling in variable stiffness and variable damping multi-layer structures as well as in dielectric elastomer actuators. We use the piezoelectric effect in PZT ceramics to develop composite structures with integrated vibration damping capabilities. Our activities span from understanding the interaction between solid matter and electrostatic fields to quantifying the effect of different damping mechanisms on the dynamic behavior of structures.
Integrated Multi-field Metamaterial Damping
In this project, internally resonant mechanisms and their integration into structural aerospace components as metamaterials is investigated. When optimized, such mechanisms drastically improve damping performance with minimum weight penalties and allow for the integration of further functionalities. Read More
Effect of periodic interconnected piezoelectric elements on wave propagation and vibration properties of structures
Develop electromechanical media for low frequency vibration attenuation. This will be achieved by investigating the underlying physics, i.e: coupling phenomena between mechanical and electrical domains as well as implementing the newly developed media on finite structures for testing and validation.
Research Projects - Concluded
Robust Damping in the Concurrent Design of Adaptive Structures
The project focuses on vibration damping using shunted piezoelectric devices. In particular we are addressing the fundamental question about the extent to which the additional degrees of freedom introduced in the design space can enhance the design while considering a conflicting set of requirements.
Morphing Airfoil with Adaptive Stiffness
Manifold work has been done on airfoil concepts, actively adapting their shape based on elastic compliance instead of rigid-body motion. In this project adaptation mechanisms using stiffness control by means of adaptive materials are investigated.
Dielectric materials for variable stiffness elements
The development of structures that can change their shape is a challenging task requiring structures acting as structural members and being compliant when the shape change is needed. The present project is aimed to use electrostatic fields to obtain a reversible lamination of a multilayer structure.
valiDation of Radical Engine Architecture systeMs (DREAM)
Open rotor jet engines promise to be more fuel efficient than state-of-the art engines but the noise emission problems are more severe. The Swiss cluster contributes interdisciplinary research on methods of active damping and flutter control of the composite-material rotors.
Piezoelectric Shunt-Damping in Aeroelastic Applications
The planned research aims at investigation of shunt-damping concepts for aeroelastic applications. We plan to develop a numeric tool to investigate the influence of increased structural damping on the flutter behaviour in aeroelastic systems. The work envisaged will be conducted within DREAM.