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Characterisation of CFRP Through Enhanced Ultrasonic Testing Methods

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Abstract

Carbon fibre reinforced composite materials enjoy an increasing field of application in the aeronautical environment and are due to expand into the automotive and leisure sectors in due course. Those materials need to be qualified at reasonable cost and with considerable experience, where ultrasonic testing has become the procedure of primary choice for nondestructive testing (NDT) so far. However, the two-phase anisotropic structure of a composite material implies a variety of challenges such as scattering, beam skewing, and sound field distortion complicating the localization, sizing, and characterization of defects. Besides qualification during the manufacturing stage, additional tasks emerge once the composite material ages, maybe by mechanical fatigue, chemical ageing, or irradiation. Again characterisation of the material based on ultrasonics would allow comparisons to be made along a material’s life cycle. The knowledge generated could be used for in-situ monitoring procedures such as considered in the context of structural health monitoring (SHM).

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Acknowledgments

We acknowledge the financial support from the German Science Foundation (DFG) within the Schwerpunktprogramm 1466: Life∞—Unendliche Lebensdauer für zyklisch beanspruchte Hochleistungswerkstoffe.

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Correspondence to T. B. Helfen.

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Helfen, T.B., Venkat, R.S., Rabe, U. et al. Characterisation of CFRP Through Enhanced Ultrasonic Testing Methods. Appl Compos Mater 19, 913–919 (2012). https://doi.org/10.1007/s10443-012-9250-2

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  • DOI: https://doi.org/10.1007/s10443-012-9250-2

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