Nondestructive Evaluation of Large Scale Composite Components

摘要

This report covers the development of a reciprocating time-of-flight ultrasonic inspection system capable of rapid scanning on large area composite structures. Representative aircraft composite structures with flaw inclusions were fabricated to evaluate the effects of scanner design, coupling characteristics, part curvature, near and far surface defect detection, imaging, and data acquisition and storage capabilities. The results were used to combine a mechanical scanner, software, and electronics equipment into a working breadboard system. Breadboard evaluation results indicate that a downsized portable system is a viable inspection tool, and produces production quality ultrasonic C-scan images at comparable production scanning rates.