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Monitoring damage growth in titanium matrix composites using acoustic emissionThe 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.
Document ID
19930015883
Acquisition Source
Legacy CDMS
Document Type
Technical Memorandum (TM)
Authors
Bakuckas, J. G., Jr. (NASA Langley Research Center Hampton, VA, United States)
Prosser, W. H. (NASA Langley Research Center Hampton, VA, United States)
Johnson, W. S. (NASA Langley Research Center Hampton, VA, United States)
Date Acquired
September 6, 2013
Publication Date
March 1, 1993
Subject Category
Composite Materials
Report/Patent Number
NAS 1.15:107742
NASA-TM-107742
Accession Number
93N25072
Funding Number(s)
PROJECT: RTOP 763-23-45-85
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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