Virginia TechStanton, Samuel C.Erturk, AlperMann, Brian P.Inman, Daniel J.2014-04-162014-04-162010-12-01Stanton, Samuel C.; Erturk, Alper; Mann, Brian P.; et al., "Resonant manifestation of intrinsic nonlinearity within electroelastic micropower generators," Appl. Phys. Lett. 97, 254101 (2010); http://dx.doi.org/10.1063/1.35304490003-6951http://hdl.handle.net/10919/47407This letter investigates the nonlinear response of a bimorph energy harvester comprised of lead zirconate titanate (PZT-5A) laminates. For near resonant excitations, we demonstrate significant intrinsic nonlinear behavior despite geometrically linear motion. Fourth order elastic and electroelastic tensor values for PZT-5A are identified following methods recently published concerning a PZT-5H bimorph. A response trend indicative of a nonlinear dissipative mechanism is discussed as well as the inadequacy of linear modeling. The PZT-5A bimorph exhibits an increased softening frequency response in comparison to PZT-5H. The results contained herein are also applicable to electroelastic sensor and actuator technologies. (C) 2010 American Institute of Physics. [doi:10.1063/1.3530449]en-USIn CopyrightPiezoceramicsArticle - Refereedhttp://scitation.aip.org/content/aip/journal/apl/97/25/10.1063/1.3530449https://doi.org/10.1063/1.3530449