Method for Confirming Internal Stress of Resin and Apparatus for Measuring Same
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United States of America
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Issued Date -
Feb 13, 2025
app pub date -
Aug 31, 2022
filing date -
Aug 31, 2022
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Abstract
To provide an internal stress confirming method of a resin which is capable of measuring an internal stress of a translucent resin such as a fluororesin and a fluororubber and dynamically confirming stress propagation, and an apparatus measuring for the same. The internal stress confirming method for confirming an internal stress of a measurement target containing a translucent resin includes irradiating the measurement target with near-infrared light having a peak wavelength in a near-infrared band of 800 nm to 2500 nm through frosted glass, a polarizer, and a ¼ wavelength plate; acquiring a near-infrared image by imaging the measurement target through a ¼ wavelength plate and an analyzer; and confirming the internal stress of the measurement target based on the near-infrared image.
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