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The use of complex material constants to model losses in piezoelectric

1999; Acoustical Society of America; Volume: 106; Issue: 4_Supplement Linguagem: Inglês

10.1121/1.427979

1520-9024

Binu K. Mukherjee, Guomao Yang, Stewart G. Sherritt,

Advanced MEMS and NEMS Technologies

Complex material constants are now being used to accurately model the dynamic response of piezoelectric materials. A simple physical model of piezoelectric materials will be used to show how complex material constants can be conveniently used to characterize losses in the dielectric, elastic, and piezoelectric response of piezoelectric materials. The same model is also used to explain why the material constants are also a function of frequency, temperature, and applied signal strength. Theoretical attempts to understand the loss mechanisms and experimental methods to measure the various functional dependencies will be reviewed. [Funding support from the U.S. Office of Naval Research is gratefully acknowledged.]