Abstract
Ultrasonic guided wave tomography provides an imaging potential over a hidden and inaccessible damage zone. The use of shear horizontal guided waves has been proposed as an attractive technique for surface defect characterization. In this paper, imaging of wall thinning defects in plate is investigated by using electromagnetic ultrasonic shear horizontal guided wave tomography. Shear horizontal guided waves are generated and measured by magnetostrictive patch transducers. The quantification via imaging of wall thinning defects is achieved by a modified reconstruction algorithm for the probabilistic inspection of damage tomography algorithm. The location and shape of wall thinning defects are successfully obtained by the electromagnetic ultrasonic wave signals. The present approach provides an alternative alternative, that can be applied for detecting, locating and imaging the wall thinning defects in plate-like structures.