TY - GEN
T1 - Modified lead titanate/polymer 1-3 composite transducers for structural health monitoring
AU - Koduru, Jaya Prakash
AU - Rose, Joseph L.
PY - 2010
Y1 - 2010
N2 - Lamb wave techniques provide an effective means for inspecting large areas of thin structures. Defects arising from corrosion, cracking, adhesive debonding etc. can be monitored continuously by permanently embedding sensors on the structure. However, with the permanently embedded sensors, multiple wave modes are normally generated making the received signals complex to analyze. Interdigital transducers (IDT's) can be used to achieve mode control, giving the capability to excite individual modes. This significantly enhances the ability to extract meaningful information from the received signals. PVDF is commonly used with appropriate electrodes to excite the desired wave mode in the structure. However, due to its low electromechanical coupling coefficient, performance on structures like multi-layered plates and carbon fiber composites is very poor. 1-3 piezocomposites with high electromechanical coupling and bandwidth are designed to overcome the limitations of PVDF. Transducers designed with modified lead titanate are tested on a multi-layered structure to detect delamination at the metal-epoxy interface.
AB - Lamb wave techniques provide an effective means for inspecting large areas of thin structures. Defects arising from corrosion, cracking, adhesive debonding etc. can be monitored continuously by permanently embedding sensors on the structure. However, with the permanently embedded sensors, multiple wave modes are normally generated making the received signals complex to analyze. Interdigital transducers (IDT's) can be used to achieve mode control, giving the capability to excite individual modes. This significantly enhances the ability to extract meaningful information from the received signals. PVDF is commonly used with appropriate electrodes to excite the desired wave mode in the structure. However, due to its low electromechanical coupling coefficient, performance on structures like multi-layered plates and carbon fiber composites is very poor. 1-3 piezocomposites with high electromechanical coupling and bandwidth are designed to overcome the limitations of PVDF. Transducers designed with modified lead titanate are tested on a multi-layered structure to detect delamination at the metal-epoxy interface.
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U2 - 10.1063/1.3362299
DO - 10.1063/1.3362299
M3 - Conference contribution
AN - SCOPUS:77950130316
SN - 9780735407480
T3 - AIP Conference Proceedings
SP - 1799
EP - 1806
BT - Review of Progress in Quantitative Nondestructive Evaluation
T2 - 36th Annual Review of Progress in Quantitative Nondestructive Evaluation, QNDE
Y2 - 26 July 2009 through 31 July 2009
ER -