Verification of Robustness in Smart Composite Structures
In order to implement health monitoring methods in composite material structures that are being developed and manufactured, a series of preliminary tests was conducted. The aim was to check the influence of an implemented SMART® layer on a graphite-epoxy structure, its durability and its ability to detect changes in the structure. A series of preliminary tests was conducted, in order to check the mechanical and electrical properties of the plate-sensors system (strength, rigidity, PZT capacitance, response to voltage input). The outcome of these experiments showed that the SMART Layer® (by Acellent Technology Inc.) increased the graphite-epoxy plate's flexibility, and the piezo-sensors were found to survive this procedure with no distinguishable damage. Subsequently, experiments were performed, to detect changes in boundary conditions imposed on the plate. A visual verification indicating changes in boundary conditions or the presence of simulated damage was received.
Pietro VINCENZINI and Fabio CASCIATI
N. Kipnis et al., "Verification of Robustness in Smart Composite Structures", Advances in Science and Technology, Vol. 56, pp. 315-323, 2008