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HERO ID
7151644
Reference Type
Journal Article
Title
Quantitative Verification of Thin-film Polyvinylidene Fluoride (PVDF) Transducer Array Performance up to 60 degrees C
Author(s)
Hakoda, C; Ren, B; Lissenden, CJ; Rose, JL; ,
Year
2017
Publisher
AMER INST PHYSICS
Location
MELVILLE
DOI
10.1063/1.4974559
Web of Science Id
WOS:000403042900018
Abstract
Thin-film PVDF (polyvinylidene fluoride) transducers are appealing as low cost, light weight, durable, and flexible sensors for structural health monitoring applications in aircraft structures. However, due to the relatively low Curie temperature of PVDF, there is a concern that it's performance will drop below acceptable levels during elevated-temperature operating conditions. To verify acceptable performance in these environmental operating conditions, temperature history data were collected between 23-60 degrees C. The effect of temperature on the thin-film PVDF was investigated and a temperature-independent damage feature was assessed. The temperature dependence of the signal's peak amplitude was investigated in both the time domain and the spectral domain to get two damage features. It was found that the measurement of the incident guided wave by the thin-film PVDF transducer had a temperature dependence that varied with frequency. A third damage feature, the mode ratio, was also calculated in the spectral domain with the goal of defining a damage feature that is temperature independent. A comparison of how well these damage features performed when used to identify a notch in an aluminum plate was made using receiver operating characteristic curves and their respective area under the curve values. This result demonstrated that a temperature-independent damage feature can be calculated, to some degree, by using a mode ratio between two modes of similar temperature dependence.
Conference Name
43rd Annual Review of Progress in Quantitative Nondestructive Evaluation (QNDE)
Conference Location
Atlanta, GA
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