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Ultrasonic Assessment of Impact Damages in Fiber-Metal Laminated Panels


 Damages generated by instrumented drop-weight impacting onto various types of Glare fiber-metal laminated panels were assessed by the immersion ultrasonic NDE technique. Factors affecting impact damage tolerance of fiber-metal laminates, such as the choice of aluminum alloy, lay-up sequence, panel thickness, etc., were considered. One major goal of this study is to identify proper immersion ultrasound parameters for better detecting failure mechanisms, especially those hidden inside these opaque materials. They include B- or C-scanning, focused or flat transducers, transducer frequency, pulse-echo or through-transmission mode, etc.