Embedded cure monitor, strain gauge, and mechanical state estimator

Joel Dubow; Wenjia Zhang; Yijang Lu; Jeremy Bingham; F. Syammach; Donald G. Krantz; John H. Belk; Paul J. Biermann; Ramesh Harjani; Susan C. Mantell; Dennis L. Polla; Philip R. Troyk

doi:10.1117/12.354288

20 July 1999 Embedded cure monitor, strain gauge, and mechanical state estimator

Joel Dubow, Wenjia Zhang, Yijang Lu, Jeremy Bingham, F. Syammach, Donald G. Krantz, John H. Belk, Paul J. Biermann, Ramesh Harjani, Susan C. Mantell, Dennis L. Polla, Philip R. Troyk

Author Affiliations +

Proceedings Volume 3673, Smart Structures and Materials 1999: Smart Electronics and MEMS; (1999) https://doi.org/10.1117/12.354288
Event: 1999 Symposium on Smart Structures and Materials, 1999, Newport Beach, CA, United States

Abstract

Pressed PZT Piezoelectric disks were embedded in a range of materials and their properties monitored under a wide range of conditions. The output depends on the temperature and pressure exerted on the PZT by the surrounding material and by the mechanical impedance mismatch between the embedded PZT and the surroundings. By monitoring the `Q' of the PZT (the ratio of energy stored to energy dissipated) it was found that the PZT discs could be used as cure monitors, strain gauges, and as embedded dynamic mechanical property estimators. This latter property is a means of gauging the `health of the material', and its degradation with time. These sensors were part of the MTS/US Navy embedded sensor program, so the sensors could be addressed and read remotely. The techniques, the data and the applications are discussed in this paper.

Citation Download Citation

Joel Dubow, Wenjia Zhang, Yijang Lu, Jeremy Bingham, F. Syammach, Donald G. Krantz, John H. Belk, Paul J. Biermann, Ramesh Harjani, Susan C. Mantell, Dennis L. Polla, and Philip R. Troyk "Embedded cure monitor, strain gauge, and mechanical state estimator", Proc. SPIE 3673, Smart Structures and Materials 1999: Smart Electronics and MEMS, (20 July 1999); https://doi.org/10.1117/12.354288

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