Low-field and high-field characterization of THUNDER actuators

Zoubeida Ounaies; Karla M. Mossi; Ralph C. Smith; Jeffrey D. Bernd

doi:10.1117/12.432779

11 July 2001 Low-field and high-field characterization of THUNDER actuators

Zoubeida Ounaies, Karla M. Mossi, Ralph C. Smith, Jeffrey D. Bernd

Proceedings Volume 4333, Smart Structures and Materials 2001: Active Materials: Behavior and Mechanics; (2001) https://doi.org/10.1117/12.432779
Event: SPIE's 8th Annual International Symposium on Smart Structures and Materials, 2001, Newport Beach, CA, United States

Abstract

THUNDER (THin Unimorph DrivER) actuators are pre-stressed piezoelectric devices developed at NASA LaRC that exhibit enhanced strain capabilities. As a result, they are of interest in a variety of aerospace applications. Characterization of their performance as a function of electric field, temperature and frequency is needed in order to optimize their operation. Towards that end, a number of THUNDER devices were obtained from FACE International Co. with a stainless steel substrate varying in thickness form 1 mil to 20 mils. The various devices were evaluated to determine low-field and high-field displacement as well as the polarization hysteresis loops. The thermal stability of these drivers was evaluated by two different methods. First, the samples were thermally cycled under electric field by systematically increasing the maximum temperature from 25 degree(s)C to 200 degree(s)C while the displacement was being measured. Second, the samples were isothermally ages at 0 degree(s)C, 50 degree(s)C, 100 degree(s)C, and 150 degree(s)C in air, and the isothermal decay of the displacement was measured at room temperature as a function of time.

Citation Download Citation

Zoubeida Ounaies, Karla M. Mossi, Ralph C. Smith, and Jeffrey D. Bernd "Low-field and high-field characterization of THUNDER actuators", Proc. SPIE 4333, Smart Structures and Materials 2001: Active Materials: Behavior and Mechanics, (11 July 2001); https://doi.org/10.1117/12.432779

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