1 February 2001 Nondestructive testing of carbon-fiber-reinforced laminates by monitoring of electrical resistance
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Proceedings Volume 4348, Fourth International Workshop on Nondestructive Testing and Computer Simulations in Science and Engineering; (2001) https://doi.org/10.1117/12.417669
Event: Fourth International Workshop on Nondestructive Testing and Computer Simulations in Science and Engineering, 2000, St. Petersburg, Russian Federation
Abstract
We report on simultaneous monitoring of electrical resistance and acoustic emission (AE) during cyclic tensile loading of cross-ply carbon fiber reinforced plastics (CFRP). The parallel detection of the AE serves as a reference method for the investigation of the microscopic damage mechanisms causing the electrical response. During loading and unloading the samples, the electrical measurements show a hysteresis in the resistance versus strain plot. Exceeding the previous load maximum in the consecutive load cycle, a characteristic increase in the measured resistance-strain slope appears combined with a sudden rise in the AE (Kaiser effect). Thus, the reported in situ observation of the electrical resistance allows to distinguish virgin and damaged CFRP samples as well as to predict a previous load maximum by the characteristic change in the resistance-strain slope.
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Torsten Prasse, Torsten Prasse, F. Michel, F. Michel, Gerhard Mook, Gerhard Mook, Karl Schulte, Karl Schulte, Wolfang Bauhofer, Wolfang Bauhofer, } "Nondestructive testing of carbon-fiber-reinforced laminates by monitoring of electrical resistance", Proc. SPIE 4348, Fourth International Workshop on Nondestructive Testing and Computer Simulations in Science and Engineering, (1 February 2001); doi: 10.1117/12.417669; https://doi.org/10.1117/12.417669
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