Model-Based Iterative Flaw Sizing for Thick Composites
Ultrasonic inspection of thick composites has been plagued by many problems such as the high degree of anisotropy and difficulties in achieving sufficient signal penetration. The dependency of wave speed to propagation direction causes beam skewing and excess beam divergence in certain directions, leading in turn to distortion of beam profile. Consequently, the beam distortion generates false indication of size and location of a flaw. This distortion of the beam in thick composites depends on several factors such as fiber layout of the material, size and frequency of the transducer used, etc.
KeywordsDisplacement Field Beam Profile Apparent Size Ultrasonic Beam Ultrasonic Inspection
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