Monitoring Damage Growth in Titanium Matrix Composites Using Acoustic Emission

By: Nasa, National Aeronautics and Space Adm

The application of the acoustic emission (AE) technique to locate and monitor damage growth in titanium matrix composites (TMC) was investigated. Damage growth was studied using several optical techniques including a long focal length, high magnification microscope system with image acquisition capabilities. Fracture surface examinations were conducted using a scanning electron microscope (SEM). The AE technique was used to locate damage based on the arrival times of AE events between two sensors. Using model specimens exhibiting a dominant failure mechanism, correlations were established between the observed damage growth mechanisms and the AE results in terms of the events amplitude. These correlations were used to monitor the damage growth process in laminates exhibiting multiple modes of damage. Results revealed that the AE technique is a viable and effective tool to monitor damage growth in TMC. Bakuckas, J. G., Jr. and Prosser, W. H. and Johnson, W. S. Langley Research Center RTOP 763-23-45-85...

• Format: Paperback
• Language: English
• ISBN: 1729349587
• ISBN13: 9781729349588
• Release Date: January 1
• Publisher: Independently Published
• Length: 50 Pages
• Weight: 0.31 lbs.
• Dimensions: 0.1" x 8.5" x 11.0"