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Method of determining load in anisotropic non-crystalline materials using energy flux deviationAn ultrasonic wave is applied to an anisotropic sample material in an initial direction and the intensity of the ultrasonic wave is measured on an opposite surface of the sample material by two adjacent receiving points located in an array of receiving points. A ratio is determined between the measured intensities of two adjacent receiving points, the ratio being indicative of an angle of flux deviation from the initial direction caused by an unknown applied load. This determined ratio is then compared to a plurality of ratios of a similarly tested, similar anisotropic reference material under a plurality of respective, known load conditions, whereby the load applied to the particular anisotropic sample material is determined. A related method is disclosed for determining the fiber orientation from known loads and a determined flux shift.
Document ID
19950005016
Acquisition Source
Legacy CDMS
Document Type
Other - Patent
Authors
Prosser, William H. (NASA Langley Research Center Hampton, VA, United States)
Kriz, Ronald D. (NASA Langley Research Center Hampton, VA, United States)
Fitting, Dale W. (NASA Langley Research Center Hampton, VA, United States)
Date Acquired
August 17, 2013
Publication Date
August 16, 1994
Subject Category
Nonmetallic Materials
Accession Number
95N11429
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Patent
NASA-CASE-LAR-14399-2|US-PATENT-5,337,610|US-PATENT-5,209,123
Patent Application
US-PATENT-APPL-SN-027092|US-PATENT-APPL-SN-797507

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