8 May 1995 Analytically/experimentally evaluating the response of cylindrical piezoelectric material systems subjected to thermal loads
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Abstract
An electromechanical elasticity solution is presented to evaluate the response of a piezoelectric linear motor at cryogenic temperatures. This model incorporates the pronounced coupling which occurs in these materials between temperature and piezoelectric strain coefficients. Results from experimental tests are presented for ceramic piezoelectric flat specimens to determine the linear and nonlinear properties required in the model; including thermal expansion coefficients, coupling terms, and piezoelectric strain coefficient functionally dependent upon electric and thermal fields. Test results indicate that depoling and saturation effects in this ceramic piezoelectric material are strain dependent and electric field independent. These results suggest that piezoelectric materials can operate as effectively at cryogenic temperatures as they do at room temperatures. Comparison between the analytical model and experimental results for a cylindrical material system yields reasonable correlation. Conclusions include that a linear motor can be designed to operate at cryogenic temperatures.
© (1995) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Mike A. Stam, Donny P. Wang, and Gregory Paul Carman "Analytically/experimentally evaluating the response of cylindrical piezoelectric material systems subjected to thermal loads", Proc. SPIE 2443, Smart Structures and Materials 1995: Smart Structures and Integrated Systems, (8 May 1995); doi: 10.1117/12.208280; https://doi.org/10.1117/12.208280
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