Application of a Self-Calibrating Ultrasonic Technique to the Detection of Fatigue Cracks by the Use of Lamb Waves

The potential use of guided waves for defect characterization is studied. The influence of defect shape and size on transmitted and reflected fields is considered. Using the hybrid boundary element technique, the reflection and transmission coefficients for selected guided wave modes are numerically calculated and compared to experimental data. Selecting the aspect ratio as a shape parameter for various defects, the transmission and reflection coefficients are measured for certain guided wave modes input to the defect. The influence of defect size is then studied by monitoring the transmission and reflection coefficients for defects of various shapes and depths. The studies presented indicate that defect characterization is possible if a proper mode selection criteria can be established. The suitable features related to transmission and reflection coefficient data can also be used for algorithm development and implementation purposes of defect characterization.

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Application of a Self-Calibrating Ultrasonic Technique to the Detection of Fatigue Cracks by the Use of Lamb Waves

Cited by 3 publications

References 1 publication

Ultrasonic Testing Techniques for Nondestructive Evaluation of Fiber-Reinforced Composite Structures

Ultrasonic Testing Techniques for Nondestructive Evaluation of Fiber-Reinforced Composite Structures

Advances, limitations and prospects of nondestructive testing and evaluation of thick composites and sandwich structures: A state-of-the-art review

Lamb wave scattering analysis for reflector characterization

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