Vendor software supplied with commercial acoustic emission equipment is incapable of performing the analysis required to characterize damage and make decisions on remaining life for NASA composite overwrapped pressure vessels (COPVs). The Acoustic Emission Analysis Applet (AEAA) software, currently a post-processing capability, will, in the second phase of the program, be modified to work in-situ in order to allow near-real-time decision-making on COPV damage and remaining life. Ultimately, this software will be utilized in-situ in pseudo-real time to monitor COPVs on space vehicles.

The AEAA calculates and displays various acoustic emission statistics as a function of pressure profile and time. The software can handle data sets of unlimited size, and features a user-friendly interface. An executable version of this software has been released for use by other government agencies, industry, and academia involved in acoustic emission efforts.

The software is versatile enough to perform novel AE analysis on AE data acquired from different instrumentation/ vendors. The applet will compute basic AE statistics, statistics as a function of time, and statistics as a function of pressure. At the time of this reporting, the applet has worked with Digital Wave Corporation and Physical Acoustics/Mistras Group, Inc. acoustic emission raw data. This software can be made to work with any data once the data format is known through modification of the software by the authors.

This work was done by Don J. Roth and Charles T. Nichols of Glenn Research Center. Contact NASA Glenn Research Center’s Technology Transfer Program at This email address is being protected from spambots. You need JavaScript enabled to view it. or visit us on the Web at  Please reference LEW-19032-2.

NASA Tech Briefs Magazine

This article first appeared in the June, 2015 issue of NASA Tech Briefs Magazine.

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