Study of mixed mode stress intensity factors using the experimental method of caustics

dc.contributor.advisor Loren W. Zachary
dc.contributor.author Younis, Nashwan
dc.contributor.department Engineering Science and Mechanics
dc.date 2018-08-15T13:37:16.000
dc.date.accessioned 2020-07-02T06:15:23Z
dc.date.available 2020-07-02T06:15:23Z
dc.date.copyright Fri Jan 01 00:00:00 UTC 1988
dc.date.issued 1988
dc.description.abstract <p>An experimental study was conducted to determine the stress intensity factors at a crack tip resulting from the interaction between two edge cracks. The experimental technique used the caustics reflected from a transparent model. Six pairs of equal length edge cracks in a plate subjected to extension were used. Six ratios of the distance between the two cracks and the crack length were investigated. An interaction between two edge cracks of lengths 0.3[superscript]'' and 0.4[superscript]'' was also studied. The effect of the distance between the cracks upon the determination of the stress intensity factors was investigated;An iterative least square technique was developed to extract mixed mode stress intensity factors together with the exact location of the crack tip from an overdetermined set of data points. The accuracy of the technique was improved by using a digital image analysis system;The method of caustics was extended to the determination of the stress-optical constants by applying the method in the region very close to a circular hole in a thin plate. A new technique was developed to determine the two stress-optical constants associated with the caustics reflected from the rear face and transmitted through an optically isotropic model.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/rtd/9747/
dc.identifier.articleid 10746
dc.identifier.contextkey 6366555
dc.identifier.doi https://doi.org/10.31274/rtd-180813-12324
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath rtd/9747
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/82879
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/rtd/9747/r_8825468.pdf|||Sat Jan 15 02:37:08 UTC 2022
dc.subject.disciplines Mechanical Engineering
dc.subject.keywords Engineering mechanics
dc.subject.keywords Engineering science and mechanics
dc.title Study of mixed mode stress intensity factors using the experimental method of caustics
dc.type article
dc.type.genre dissertation
dspace.entity.type Publication
thesis.degree.level dissertation
thesis.degree.name Doctor of Philosophy
File
Original bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
r_8825468.pdf
Size:
1.73 MB
Format:
Adobe Portable Document Format
Description: