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Sensor concept based on piezoelectric PVDF films to measure fracture mechanical parameters

Materialpruefung/Materials Testing, ISSN: 0025-5300, Vol: 52, Issue: 5, Page: 292-299
2010
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Article Description

A new sensor concept for fatigue crack growth monitoring in technical structures is presented. It allows the in-situ determination of the position of the crack tip as well as the fracture mechanical parameters. The required data are obtained from a piezoelectric polymer film, which is attached to surface of the structure. The stress intensity factors and the crack tip position are calculated from electrical potential obtained from sensor array by solving the non-linear inverse problem.

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