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  • Measurement of acoustic properties of the composite materials constituting the main rotor hub of the Agusta Westland helicopter EH-101 (civil version)


The design of an automatic system for ultrasonic inspection entails knowledge of the acoustic characteristics of the materials in the structure of the component to be controlled. In the specific case of the main rotor hub of the Agusta-Westland EH-101, which is almost entirely made of composite materials, this is more important than in the general case. Methods to be used for the measurement of propagation velocities and attenuation factors as a function of the frequency in each kind of composite material that constitutes the rotor hub are described. The resulting data will then be used to define the transducers, the scanning modes and the signal processing. In this way it will be possible to develop an inspection procedure and system hardware and software that will guarantee the highest aircraft flight safety.

Additional information

Authors: TENTI L, Agusta SpA, Cascina Costa di Samarate (IT);DENIS R, JRC Ispra (IT);LAKESTANI F, JRC Ispra (IT)
Bibliographic Reference: Article: NDT & E International - The Independent Journal of Non-destructive Testing, Vol. 24 (1991) No. 5, pp. 253-258
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