Ultrasonic Transmission Detection Techniques for Large Complex Curved Surface of Composite Material

Abstract

In this paper,the detection of common defects such as inclusion,void and delamination for large- scaled curved composite material is studied. The principle for transmission method is focused on introducing. Moreover,the results of the C- Scan experiment for different size defects of different thickness carbon- fiber composite supported the opinion above. The technology of trajectory planning and motion control for twin- robot defects detect of various curved composite sample using ultrasonic transmission method is also discussed. An ultrasonic NDT system is developed for testing large- scaled curved composite components used in aerospace and other fields. It will be very significant for our nondestructive testing work.