Acousto-ultrasonic characterization of C/SiC composites under different loading configurations

Laura M. Cosgriff; Richard E. Martin; George Y. Baaklini

doi:10.1117/12.484292

1 August 2003 Acousto-ultrasonic characterization of C/SiC composites under different loading configurations

Laura M. Cosgriff, Richard E. Martin, George Y. Baaklini

Proceedings Volume 5046, Nondestructive Evaluation and Health Monitoring of Aerospace Materials and Composites II; (2003) https://doi.org/10.1117/12.484292
Event: NDE for Health Monitoring and Diagnostics, 2003, San Diego, California, United States

Abstract

Strong, lightweight, temperature-resistant ceramic matrix composite (CMC) materials such as carbon fiber reinforced silicon carbide (C/SiC) are being developed for use in reusable launch vehicles. C/SiC coupons were developed to investigate damage behavior due to tensile and fatigue testing. In order to describe the nature of damage in this material a nondestructive evaluation technique that can detect damage progression is necessary. This study determines acousto-ultrasonics’ (AU) capabilities and limitations for the detection of damage in these composites. AU parameters were evaluated for two sets of C/SiC coupons prior to interrupted fatigue testing. In addition, a single coupon was tested with two different loading configurations. The statistical significance of several AU parameters is determined for characterizing this composite material. Ten AU waveforms were collected along the gauge length of the C/SiC coupons prior to tensile and fatigue testing. Three operators collected the waveforms from each set of coupons to check repeatability. These waveforms were processed with an analysis routine that calculates AU parameters such as ultrasonic decay rate, the first moment of the power spectrum (M0), and the centroid of the power spectrum (fc). The results will recommend the most repeatable AU parameters and loading configuration for future evaluation of C/SiC components.

Citation Download Citation

Laura M. Cosgriff, Richard E. Martin, and George Y. Baaklini "Acousto-ultrasonic characterization of C/SiC composites under different loading configurations", Proc. SPIE 5046, Nondestructive Evaluation and Health Monitoring of Aerospace Materials and Composites II, (1 August 2003); https://doi.org/10.1117/12.484292

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available