31 March 2010 In-situ determination of stress intensity factors for the prediction of fatigue crack growth using piezoelectric polymer coatings
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Abstract
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 quantities. The required data are obtained from a piezoelectric polymer film, which is attached to the surface of the monitored structure. The stress intensity factors and the crack tip position are calculated from electrical potentials obtained from a sensor array by solving the non-linear inverse problem.
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Andreas Ricoeur, Dennis Bäcker, Meinhard Kuna, "In-situ determination of stress intensity factors for the prediction of fatigue crack growth using piezoelectric polymer coatings", Proc. SPIE 7647, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2010, 764724 (31 March 2010); doi: 10.1117/12.847641; https://doi.org/10.1117/12.847641
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