Nde for Prognostic Structural Characterization
نویسنده
چکیده
Probing material degradation and properties change to anticipate stages of damage can be achieved using advanced in-situ and hybrid non-contact remote ultrasonic sensing including laser generation and air-coupled detection arrangements. The sensing technology is based on application of guided waves such as plate (Lamb waves) or surface waves (Rayleigh waves) for direct material interrogation that can be performed over long range and on geometrically complex components. Signal processing such as Wavelet analysis of recorded signals from a single test enables assessments of the material condition. Experimental results demonstrate that such testing techniques can perform the inspection from only one side of the structure and have potential to estimate elastic modulai of the material. Such ultrasonic sensing configurations make nondestructive test technology feasible to support structural integrity assessment and life service inspections of metal, bonded or composite based structures.
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