0000000000359738
AUTHOR
Xianlong Chen
A new method for Poisson’s ratio measurement with time-of-flight technique: application to the preliminary design of smart composite structures
International audience; Smart composite structures, which are able to modify their mechanical properties with respect to their environment (e.g. active vibration control), to interact with other structures (e.g. mechatronic) or with human beings (e.g. Human-Machine Interaction), are widely used in the modern industrial fields (e.g. aerospace), due to the intensification of the operational dynamic environment and an increase of durability requirements from the customers. Conventionally, the piezoelectric transducers are glued on the surface of the structure and the power and control electronics are away. To protect the transducer elements and their connections and develop some industrially p…
Structural health monitoring of a smart composite structure with a Time-of-Flight method
International audience; Smart composite structures with a fully distributed set of integrated piezoelectric transducers are used to demonstrate the feasibility of embedded Structural health monitoring (SHM). Indeed, the piezo ceramics elements have been directly integrated into the heart of the composite during the manufacturing process. Then, a Time-of-Flight method has been applied. This technique is based on the duration measurements of a wave propagation with a simple and low cost experimental setup. Integrated piezoelectric transducers are used for monitoring the behavior of the structure. In this research, special plates (with a piezo ceramics disk on each corner), made of glass fibre…
Complex composite structures with integrated piezoelectric transducers
International audience; Nowadays, in different industrial fields as transport or aerospace, a research effort is conducted to reduce the structural weight. One of the most promising solutions is the use of composite structures due to their high stiffness, their low mass density and their low damping factor. At the same time, there is an intensification of the operational dynamic environment and an increase of durability requirements. These different expectations seem to be contradictory. One solution to manage these points is to design and manufacture smart composite structures with a fully distributed set of integrated piezoelec-tric transducers. These structures are able to modify their m…
SmaRt Composite StructurE (Project SyRaCuSE) Towards mastering challenges concerning the product lifecycle
International audience; Since the middle of the 80’s, smart composite structures are announced as being able to revolutionize the industrial world and become a main engine of economic growth. A smart composite structure is a structure combining distributed actuator and sensor networks embedded at the heart of the matter and a command and control unit. The idea is to mimic nature in order to produce industrial composite structures that will adapt their functionality to their environment in a predicted manner. This approach seems attractive with a lot of potential applications: Vibration suppression, non-Destructive Evaluation, Energy Harvesting, Internet of Things... In a way, the smart comp…