Experimental Studies on Soft Core Sandwich Plates with a Built-In Adaptive Layer
A common form of an adaptive structure is a thin type structure equipped with piezoelectric laminae. These laminae are made of piezoelectric materials such as Polyvinylidene Fluoride (PVDF) — a piezoelectric copolymer film  or Lead Zirconia Titanate (PZT) — a piezoceramic based material available at present in relatively small rectangular patches. The figure of merit of such laminae is their capability of transducing electric fields into mechanical strains, and mechanical strains into electrical charges. These “active” laminae are used either to actuate the hosting structure by inducing strains in the non-piezoelectric, “passive” laminae, or to sense deflections of the hosting structure by measuring the local strain fields. The active laminae, the actuators, can be continuous over the entire domain of the structure, as in the PVDF case, or discontinuous as in the case of piezoceramic (PZT) patches. A survey on piezoelectricity and its use can be found in reference .
KeywordsZirconia Attenuation Foam Titanate Epoxy
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