Detection of acoustic second harmonics using a laser interferometer

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EditorSearch for: Thompson, Donald O.; Search for: Chimenti, Dale E.
TypeBook Chapter
Book titleReview of Progress in Quantitative Nondestructive Evaluation
Pages20512058; # of pages: 8
AbstractNon-linear acoustic measurements can provide information on the microstructure or internal state of stress of materials and offer great potential for the nondestructive characterization of materials. But non linear effects are difficult to measure, especially in industrial environments. For instance, changes in acoustic velocity with temperature or with applied stress are very small. The detection of acoustic harmonics, the interaction of multiple acoustic wavefronts, or of acoustic-radiation-induced static strain requires sensitive transducers calibrated for absolute amplitude measurements to allow die determination of the third order elastic constants. Among these techniques, the detection of second harmonics offers potential for industrial applications because it requires no applied stress, no (slow) change in temperature and only one acoustic source.
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AffiliationNRC Industrial Materials Institute; National Research Council Canada
Peer reviewedNo
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"Non-NRC publications" are publications authored by NRC employees prior to their employment by NRC.

NPARC number21273339
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Record identifier155e36d0-b199-4e4c-83b0-752125f632c9
Record created2015-01-07
Record modified2016-05-09
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