Holographic Technique for Measurements of Strain

An experimental program was carried out to see if holographic interferometry could be used to determine Young's modulus and Poisson's ratio of ice using the ring test. Spurious rigid body deflections of up to 0.5 microinch were found when the sample was compressed. These motions are of suc...

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Bibliographic Details
Main Authors: Berger,R. H., Marshall,S. J., Munis,R. H., Fourney,M. E.
Other Authors: COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER N H
Format: Text
Language:English
Published: 1975
Subjects:
Snow
Ice and Permafrost
Test Facilities
Equipment and Methods
*STRAIN(MECHANICS)
*HOLOGRAPHY
*SEA ICE
MEASUREMENT
DEFORMATION
MODULUS OF ELASTICITY
TEST METHODS
INTERFEROMETRY
POISSON RATIO
Ice
permafrost
Sea ice
Online Access:http://www.dtic.mil/docs/citations/ADA011247
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA011247
Description
Summary:An experimental program was carried out to see if holographic interferometry could be used to determine Young's modulus and Poisson's ratio of ice using the ring test. Spurious rigid body deflections of up to 0.5 microinch were found when the sample was compressed. These motions are of such magnitude that they will affect the accuracy of the bore gauge measurements of ice strength. The technique most suited to measurements of the deformation of the ice ring is speckle interferometry. This technique is most sensitive to motions of the magnitude found when using the ring test on ice and it allows measurement of motion in each of the three orthogonal directions separately so that Young's modulus and Poisson's ratio may be obtained easily.

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