Rapid transmission coefficient reconstruction and material property estimation in plates

Ultrasonic guided waves in composite plates: a study of interface bond condition and material properties determination with broadband focused air-coupled ultrasounds

“…Chimenti [31] and Fei et al [32], [34] [101], [102] analyzed the effect of the inspection geometry on the measured signal and studied the differences between the two-and the three-dimensional case in the received voltage for an immersion reflection measurement.…”

“…Lobkis et al [62] studied theoretically and experimentally the influence of the transducer's beam and geometry on the received voltage. A method for rapid reconstruction of the transmission and reflection coefficients with a broadband, wide angular range, synthetic-aperture line scans performed in water immersion has been demonstrated by Fei and Chimenti [31] and Fei et al [32], [34]. The separation of the extrinsic contributions of different geometric elements such as transducer size, location, and focal length from intrinsic material properties in the received voltage expression has been shown by Lobkis et al [63], [64].…”

“…The received voltage is then obtained, according to Fei et ai. [32], [34], and Fei and Chimenti [33], from the received voltage transducer model as…”

Ultrasonic guided waves in composite plates: a study of interface bond condition and material properties determination with broadband focused air-coupled ultrasounds

“…Lobkis et al [62] studied theoretically and experimentally the influence of the transducer's beam and geometry on the received voltage. A method for rapid reconstruction of the transmission and reflection coefficients with a broadband, wide angular range, synthetic-aperture line scans performed in water immersion has been demonstrated by Fei and Chimenti [31] and Fei et al [32], [34]. The separation of the extrinsic contributions of different geometric elements such as transducer size, location, and focal length from intrinsic material properties in the received voltage expression has been shown by Lobkis et al [63], [64].…”

“…Safaeinilli et al [88], [89] developed an air-coupled method of estimating viscoelastic stiffness in plates, exploiting a detailed calculation to predict the measurable widths and relative heights of successive transmission maxima in air and are first to introduce the synthetic aperture coordinate scanning technique to extract from the measured signal the interference of the side lobes. Chimenti and Fei [23] and Fei et al [32], [34].…”