3D Reconstruction of Ultrasonic B-Scans for Nondestructive Testing of Composites

摘要

The paper presents an approach to 3D reconstruction of a sequence of ultrasonic B-Scans for the purpose of facilitating nondestructive testing of composites. The results of ultrasonic testing of a carbon fiber reinforced polymer specimen with barely visible impact damage was used for algorithm testing. 3D visualisation of damage based on image thresholding, contour extraction and volume rendering facilitates interpretation of ultrasonic data and can be useful in the assessment of a flaw size and location, including its depth. Accuracy of the 3D reconstruction of the internal damage of the tested specimen was verified on the basis of reference data acquired with the X-ray computed tomography. Owing to the low computational complexity of the proposed algorithm it could be applied during ultrasonic inspections of composite structures.