Nonlinear ultrasonic testing for non-destructive measurement of longitudinal thermal stresses in solids
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United States of America Patent
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Jun 5, 2018
Issued Date -
Dec 31, 2015
app pub date -
Feb 5, 2014
filing date -
Feb 6, 2013
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Abstract
Methods and apparatus, including computer program products, are provided for nonlinear ultrasonic testing. In one aspect there is provided a method, which may include generating at least one ultrasonic wave to enable the at least one ultrasonic wave to propagate through a solid; detecting the at least one ultrasonic wave propagating through the solid; and determining a stress of the solid based on at least one of an imaginary component of a wavenumber, a wave amplitude, a wave strength, a statistical moment in a time domain, or a statistical moment in a frequency domain of the at least one ultrasonic wave.
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