Decorrelation of Laser Speckle Patterns for Crack-Tip High Strain Field Determination and Use in Brittle-Ductile Fracture Analysis

dc.contributor.author Stechenrider, J. Scott
dc.contributor.author Wagner, James
dc.date 2018-02-14T05:22:03.000
dc.date.accessioned 2020-06-30T06:36:52Z
dc.date.available 2020-06-30T06:36:52Z
dc.date.copyright Mon Jan 01 00:00:00 UTC 1990
dc.date.issued 1990
dc.description.abstract <p>The uses of laser speckle photography are widespread in mechanics and metrology[1][2]. Most, if not all, of the applications of laser speckle involve the comparison of two correlated speckle patterns of a given field before and after some perturbation to the system has occurred. From the relative displacement of the correlated patterns either Young’s fringes or isothetic fringes may be produced when the specklegram is processed[3]. It is from these fringes that one quantitatively determines the speckle spacing from which such information as displacement and displacement gradient (strain) can be calculated. However, if the displacement, displacement gradient, surface tilt, or surface out-of-plane displacement is excessive, or if the surface morphology changes, the correlation of the speckle patterns is lost and the fringes are either distorted or simply no longer visible. In this case the speckle patterns are said to be decorrelated and accurate quantitative information about changes to the system is no longer available.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/qnde/1990/allcontent/224/
dc.identifier.articleid 2262
dc.identifier.contextkey 5793301
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath qnde/1990/allcontent/224
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/59613
dc.language.iso en
dc.relation.ispartofseries Review of Progress in Quantitative Nondestructive Evaluation
dc.source.bitstream archive/lib.dr.iastate.edu/qnde/1990/allcontent/224/1990_SteckenriderJS_DecorrelationLaser.pdf|||Fri Jan 14 22:43:08 UTC 2022
dc.source.uri 10.1007/978-1-4684-5772-8_224
dc.title Decorrelation of Laser Speckle Patterns for Crack-Tip High Strain Field Determination and Use in Brittle-Ductile Fracture Analysis
dc.type event
dc.type.genre article
dspace.entity.type Publication
relation.isSeriesOfPublication 289a28b5-887e-4ddb-8c51-a88d07ebc3f3
File
Original bundle
Now showing 1 - 1 of 1
Name:
1990_SteckenriderJS_DecorrelationLaser.pdf
Size:
1.12 MB
Format:
Adobe Portable Document Format
Description: