METHOD FOR THE NON-DESTRUCTIVE AND CONTACTLESS CHARACTERIZATION OF A SUBSTANTIALLY SPHERICAL MULTILAYERED STRUCTURE AND RELATED DEVICE
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United States of America Patent
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Issued Date -
Feb 16, 2012
app pub date -
Dec 23, 2009
filing date -
Dec 24, 2008
priority date (Note) -
Abandoned
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Abstract
A method is provided for the non-destructive and contactless characterization of a multilayered structure having a substantially spherical shape and including at least two layers, separated by interfaces. The method includes using a laser for locally heating the structure in a thermoelastic state so that the structure is vibrated in a non-destructive manner, measuring the resonance frequencies of the vibration modes of the structure and deriving at least one characteristic concerning the integrity or the shape or the mechanical behavior of the structure from the resonance frequencies of the structure.
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