Real-time optical holographic interferometry for high-speed high-sensitivity deformation studies

Time-resolved strain and deformation measurements are valuable as indirect indicators of internal pressure for confinement vessels, and as direct measures of early-time response in mechanical impact experiments. Surface-mounted strain gages are the most common methods of strain determination, offeri...

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Bibliographic Details
Main Authors: Tringe, Joseph W., Pease, Steven, Ovenell, Ryan T., Baldwin, Molly G., Vuppuluri, Vasant S., Keene, Lionel T.
Format: Conference Proceeding
Language:English
Subjects:
Deflagration
Deformation
Detonation
Digital imaging
Field of view
High speed cameras
Holographic interferometry
Image contrast
Internal pressure
Sensitivity
Strain gauges
Temporal resolution
Time measurement
Time response
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Summary:Time-resolved strain and deformation measurements are valuable as indirect indicators of internal pressure for confinement vessels, and as direct measures of early-time response in mechanical impact experiments. Surface-mounted strain gages are the most common methods of strain determination, offering high-sensitivity and high temporal resolution due to the low bandwidth requirements involved in sampling a simple electrical signal. However, as point measurements they can only represent a small fraction of the area of interest. Digital Image Correlation (DIC) is a common alternative offering full-field deformation/strain determination, but suffers from an inverse relationship between field-of-view and sensitivity. In contrast to these methods, traditional holographic interferometry offers wavelength-level sensitivity that is independent of object size or field-of-view and can operate at high temporal resolution using modern high-speed cameras. In this work we show how modern photopolymeric materials simplify the application of in situ holographic interferometry materials to enable holographic interferometry in deflagration-to-detonation studies.
ISSN:0094-243X
1551-7616
DOI:10.1063/12.0028730